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 0.1.23-1cc990c [2018-09-30 20:52:47,690 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:52:47,692 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:52:47,710 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:52:47,710 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:52:47,711 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:52:47,713 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:52:47,716 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:52:47,718 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:52:47,719 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:52:47,728 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:52:47,728 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:52:47,729 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:52:47,732 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:52:47,733 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:52:47,734 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:52:47,736 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:52:47,740 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:52:47,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:52:47,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:52:47,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:52:47,749 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:52:47,755 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:52:47,766 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 [2018-09-30 20:52:47,793 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:52:47,793 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:52:47,794 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:52:47,794 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:52:47,795 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:52:47,795 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:52:47,795 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:52:47,796 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:52:47,796 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:52:47,796 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:52:47,796 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:52:47,796 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:52:47,797 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:52:47,797 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:52:47,798 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:52:47,798 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:52:47,798 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:52:47,798 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:52:47,798 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:52:47,799 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:52:47,799 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:52:47,799 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:52:47,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:47,799 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:52:47,801 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:52:47,801 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:52:47,801 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:52:47,802 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:52:47,802 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:52:47,802 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:52:47,802 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:52:47,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:52:47,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:52:47,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:52:47,868 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:52:47,869 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:52:47,870 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-09-30 20:52:47,870 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-09-30 20:52:47,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:52:47,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:52:47,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:47,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:52:47,919 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:52:47,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,957 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:52:47,957 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:52:47,957 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:52:47,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:52:47,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:52:47,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:52:47,961 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:52:47,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... [2018-09-30 20:52:47,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:52:47,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:52:47,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:52:47,983 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:52:47,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:52:48,058 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-09-30 20:52:48,058 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-09-30 20:52:48,058 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-09-30 20:52:48,130 WARN L639 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-09-30 20:52:48,285 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:52:48,286 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:48 BoogieIcfgContainer [2018-09-30 20:52:48,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:52:48,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:52:48,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:52:48,295 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:52:48,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:52:47" (1/2) ... [2018-09-30 20:52:48,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f907110 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:52:48, skipping insertion in model container [2018-09-30 20:52:48,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:52:48" (2/2) ... [2018-09-30 20:52:48,298 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-09-30 20:52:48,306 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:52:48,313 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:52:48,358 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:52:48,359 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:52:48,359 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:52:48,359 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:52:48,359 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:52:48,359 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:52:48,360 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:52:48,360 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:52:48,360 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:52:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:52:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:52:48,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:48,383 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:52:48,384 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:48,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-09-30 20:52:48,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:48,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:48,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:48,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,475 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:48,475 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:48,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:52:48,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:48,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:48,753 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:52:48,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:52:48,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:52:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:52:48,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:48,785 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-09-30 20:52:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:49,001 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:52:49,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:52:49,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 20:52:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:49,014 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:52:49,015 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:52:49,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:52:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:52:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:52:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:52:49,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:52:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:49,055 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:52:49,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:52:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:52:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:52:49,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:49,056 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:52:49,056 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:49,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:49,057 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-09-30 20:52:49,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:49,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:49,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:49,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,063 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:49,063 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:49,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:49,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:49,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-30 20:52:49,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:52:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:52:49,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:49,262 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 20:52:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:49,571 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:52:49,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:52:49,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:52:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:49,573 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:52:49,573 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:52:49,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:52:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:52:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:52:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:52:49,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:52:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:49,578 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:52:49,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:52:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:52:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:52:49,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:49,579 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:52:49,579 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:49,580 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:49,580 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-09-30 20:52:49,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:49,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:49,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:49,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:49,587 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:49,587 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:49,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:49,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:49,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:49,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:49,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:49,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-30 20:52:49,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:52:49,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:52:49,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:49,855 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 20:52:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:50,152 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:52:50,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:52:50,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 20:52:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:50,153 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:52:50,154 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:52:50,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:52:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:52:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:52:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:52:50,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:52:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:50,159 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:52:50,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:52:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:52:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:52:50,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:50,160 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-09-30 20:52:50,160 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:50,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-09-30 20:52:50,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:50,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:50,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:50,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,171 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:50,171 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:50,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:50,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:50,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:52:50,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:50,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:50,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-30 20:52:50,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:52:50,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:52:50,677 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:50,677 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 20:52:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:50,963 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:52:50,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:52:50,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:52:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:50,965 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:52:50,965 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:52:50,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:52:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:52:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:52:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:52:50,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:52:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:50,971 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:52:50,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:52:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:52:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:52:50,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:50,972 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-09-30 20:52:50,972 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:50,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-09-30 20:52:50,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:50,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:50,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:50,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,987 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:50,988 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:50,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:50,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:51,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:51,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:51,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:51,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-30 20:52:51,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:52:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:52:51,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:51,138 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 20:52:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:51,469 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:52:51,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:52:51,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 20:52:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:51,471 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:52:51,471 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:52:51,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:52:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:52:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:52:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:52:51,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:52:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:51,477 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:52:51,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:52:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:52:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:52:51,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:51,478 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-09-30 20:52:51,478 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:51,478 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-09-30 20:52:51,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:51,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:51,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:51,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:51,488 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:51,488 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:51,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:51,499 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:51,514 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:52:51,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:51,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:51,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-30 20:52:51,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:52:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:52:51,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:51,687 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 20:52:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:52,059 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:52:52,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:52:52,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 20:52:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:52,061 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:52:52,061 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:52:52,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:52:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:52:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:52:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:52:52,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:52:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:52,066 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:52:52,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:52:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:52:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:52:52,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:52,067 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-09-30 20:52:52,067 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:52,067 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-09-30 20:52:52,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:52,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:52,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:52,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,077 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:52,078 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:52,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:52,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:52,103 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:52:52,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:52,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:52,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:52,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-30 20:52:52,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:52:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:52:52,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:52,288 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 20:52:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:52,740 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:52:52,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:52:52,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 20:52:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:52,742 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:52:52,742 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:52:52,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:52:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:52:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:52:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:52:52,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:52:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:52,746 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:52:52,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:52:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:52:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:52:52,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:52,747 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-09-30 20:52:52,747 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:52,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:52,748 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-09-30 20:52:52,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:52,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:52,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:52,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,758 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:52,759 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:52,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:52,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:52,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:52,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:52,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-30 20:52:52,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:52:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:52:52,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:52,967 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 20:52:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:53,601 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:52:53,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:52:53,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 20:52:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:53,603 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:52:53,603 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:52:53,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:52:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:52:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:52:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:52:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:52:53,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:52:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:53,608 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:52:53,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:52:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:52:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:52:53,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:53,609 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-09-30 20:52:53,609 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:53,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:53,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-09-30 20:52:53,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:53,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:53,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:53,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:53,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:53,620 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:53,621 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:53,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:53,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:53,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:53,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:53,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:53,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:53,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-30 20:52:53,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:52:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:52:53,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:53,953 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 20:52:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:54,535 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:52:54,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:52:54,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 20:52:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:54,536 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:52:54,536 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:52:54,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:52:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:52:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:52:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:52:54,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:52:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:54,542 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:52:54,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:52:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:52:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:52:54,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:54,543 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-09-30 20:52:54,543 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:54,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-09-30 20:52:54,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:54,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:54,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:54,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,554 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:54,554 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:54,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:54,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:54,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:52:54,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:54,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:54,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:54,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-30 20:52:54,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:52:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:52:54,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:54,903 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 20:52:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:55,622 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:52:55,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:52:55,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:52:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:55,624 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:52:55,624 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:52:55,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:52:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:52:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:52:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:52:55,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:52:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:55,629 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:52:55,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:52:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:52:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:52:55,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:55,630 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-09-30 20:52:55,630 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:55,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-09-30 20:52:55,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:55,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:55,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:55,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:55,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:55,642 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:55,642 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:55,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:55,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:55,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:55,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:55,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:55,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-30 20:52:55,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:52:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:52:55,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:55,923 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 20:52:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:56,661 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:52:56,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:52:56,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:52:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:56,663 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:52:56,663 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:52:56,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:52:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:52:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:52:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:52:56,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:52:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:56,668 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:52:56,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:52:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:52:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:52:56,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:56,669 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-09-30 20:52:56,670 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:56,670 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-09-30 20:52:56,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:56,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:56,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:56,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,682 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:56,682 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:56,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:56,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:56,739 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:52:56,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:56,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:57,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:57,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-30 20:52:57,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:52:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:52:57,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:57,021 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 20:52:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:58,053 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:52:58,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:52:58,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 20:52:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:58,054 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:52:58,054 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:52:58,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:52:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:52:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:52:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:52:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:52:58,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:52:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:58,059 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:52:58,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:52:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:52:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:52:58,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:58,060 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-09-30 20:52:58,060 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:58,060 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-09-30 20:52:58,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:58,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:58,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:58,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:58,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:58,074 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:58,075 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:58,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:58,096 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:58,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:52:58,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:58,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:58,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-30 20:52:58,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:52:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:52:58,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,478 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 20:52:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:59,509 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:52:59,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:52:59,509 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 20:52:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:59,510 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:52:59,510 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:52:59,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:52:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:52:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:52:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:52:59,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:52:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:59,515 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:52:59,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:52:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:52:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:52:59,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:59,516 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-09-30 20:52:59,517 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:52:59,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-09-30 20:52:59,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:59,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:59,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:59,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:59,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:59,529 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:52:59,529 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:52:59,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:52:59,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:59,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:59,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:52:59,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-30 20:52:59,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:52:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:52:59,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:59,915 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 20:53:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:02,080 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:53:02,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:53:02,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 20:53:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:02,081 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:53:02,081 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:53:02,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:53:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:53:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:53:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:53:02,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:53:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:02,087 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:53:02,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:53:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:53:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:53:02,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:02,088 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-09-30 20:53:02,088 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:02,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-09-30 20:53:02,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:02,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:02,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:02,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:02,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:02,099 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:02,099 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:02,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:02,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:02,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:02,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:02,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:02,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:02,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-30 20:53:02,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:53:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:53:02,847 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:02,848 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 20:53:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:04,211 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:53:04,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:53:04,212 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 20:53:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:04,213 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:53:04,213 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:53:04,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:53:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:53:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:53:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:53:04,218 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:53:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:04,218 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:53:04,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:53:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:53:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:53:04,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:04,219 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-09-30 20:53:04,220 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:04,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-09-30 20:53:04,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:04,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:04,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:04,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,230 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:04,230 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:04,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:04,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:04,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:53:04,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:04,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:05,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:05,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-30 20:53:05,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:53:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:53:05,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:05,864 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 20:53:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:07,351 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:53:07,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:53:07,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 20:53:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:07,352 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:53:07,352 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:53:07,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:53:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:53:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:53:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:53:07,358 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:53:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:07,358 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:53:07,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:53:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:53:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:53:07,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:07,359 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-09-30 20:53:07,359 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:07,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-09-30 20:53:07,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:07,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:07,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:07,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:07,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:07,369 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:07,369 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:07,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:07,380 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:07,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:07,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:07,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:07,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:07,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-30 20:53:07,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:53:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:53:07,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:07,819 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 20:53:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:09,495 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:53:09,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:53:09,496 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 20:53:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:09,496 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:53:09,497 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:53:09,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:53:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:53:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:53:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:53:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:53:09,501 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:53:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:09,502 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:53:09,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:53:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:53:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:53:09,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:09,503 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-09-30 20:53:09,503 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:09,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-09-30 20:53:09,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:09,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:09,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:09,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:09,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:09,518 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:09,519 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:09,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:09,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:09,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:53:09,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:09,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:09,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:09,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-30 20:53:09,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:53:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:53:09,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:09,975 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 20:53:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:11,658 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:53:11,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:53:11,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 20:53:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:11,660 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:53:11,660 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:53:11,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:53:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:53:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:53:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:53:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:53:11,665 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:53:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:11,666 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:53:11,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:53:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:53:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:53:11,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:11,667 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-09-30 20:53:11,667 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:11,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:11,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-09-30 20:53:11,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:11,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:11,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:11,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:11,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:11,676 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:11,676 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:11,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:11,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:11,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:53:11,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:11,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:12,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:12,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-30 20:53:12,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:53:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:53:12,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:12,231 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 20:53:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:14,121 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:53:14,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:53:14,122 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 20:53:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:14,122 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:53:14,123 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:53:14,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:53:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:53:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:53:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:53:14,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:53:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:14,128 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:53:14,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:53:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:53:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:53:14,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:14,129 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-09-30 20:53:14,129 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:14,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-09-30 20:53:14,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:14,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:14,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:14,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:14,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:14,140 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:14,141 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:14,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:14,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:14,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:14,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:14,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-30 20:53:14,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:53:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:53:14,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:14,745 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 20:53:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:16,825 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:53:16,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:53:16,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 20:53:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:16,826 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:53:16,827 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:53:16,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:53:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:53:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:53:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:53:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:53:16,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:53:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:16,831 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:53:16,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:53:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:53:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:53:16,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:16,832 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-09-30 20:53:16,832 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:16,832 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-09-30 20:53:16,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:16,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:16,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:16,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:16,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:16,841 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:16,841 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:16,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:16,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:17,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:17,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:17,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:17,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:17,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-30 20:53:17,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:53:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:53:17,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:17,534 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 20:53:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:19,702 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:53:19,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:53:19,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 20:53:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:19,703 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:53:19,703 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:53:19,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:53:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:53:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:53:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:53:19,709 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:53:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:19,709 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:53:19,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:53:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:53:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:53:19,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:19,710 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-09-30 20:53:19,710 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:19,711 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-09-30 20:53:19,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:19,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:19,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:19,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:19,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:19,719 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:19,719 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:19,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:19,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:19,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:53:19,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:19,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:20,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:20,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-30 20:53:20,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:53:20,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:53:20,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:20,482 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 20:53:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:23,066 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:53:23,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:53:23,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 20:53:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:23,069 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:53:23,069 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:53:23,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:53:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:53:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:53:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:53:23,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:53:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:23,074 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:53:23,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:53:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:53:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:53:23,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:23,075 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-09-30 20:53:23,075 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:23,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-09-30 20:53:23,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:23,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:23,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:23,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:23,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:23,084 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:23,084 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:23,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:23,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:23,291 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:23,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:23,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:24,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:24,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-30 20:53:24,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:53:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:53:24,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:24,025 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 20:53:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:26,547 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:53:26,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:53:26,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 20:53:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:26,549 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:53:26,549 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:53:26,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:53:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:53:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:53:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:53:26,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:53:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:26,554 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:53:26,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:53:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:53:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:53:26,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:26,555 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-09-30 20:53:26,555 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:26,555 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-09-30 20:53:26,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:26,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:26,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:26,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:26,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:26,563 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:26,563 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:26,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:26,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:26,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:53:26,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:26,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:27,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:27,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-30 20:53:27,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:53:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:53:27,344 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:27,344 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 20:53:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:30,000 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:53:30,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:53:30,001 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 20:53:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:30,002 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:53:30,002 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:53:30,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:53:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:53:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:53:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:53:30,007 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:53:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:30,008 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:53:30,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:53:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:53:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:53:30,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:30,009 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-09-30 20:53:30,009 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:30,009 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-09-30 20:53:30,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:30,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:30,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:30,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:30,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:30,016 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:30,017 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:30,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:30,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:30,299 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:53:30,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:30,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:30,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:30,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-30 20:53:30,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:53:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:53:30,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:30,878 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 20:53:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:33,761 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:53:33,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:53:33,762 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 20:53:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:33,763 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:53:33,763 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:53:33,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:53:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:53:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:53:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:53:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:53:33,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:53:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:33,768 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:53:33,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:53:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:53:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:53:33,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:33,768 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-09-30 20:53:33,769 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:33,769 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-09-30 20:53:33,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:33,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:33,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:33,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:33,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:33,775 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:33,776 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:33,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:33,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:34,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:34,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:34,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-30 20:53:34,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:53:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:53:34,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:34,717 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 20:53:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:37,753 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:53:37,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:53:37,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 20:53:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:37,754 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:53:37,754 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:53:37,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:53:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:53:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:53:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:53:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:53:37,760 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:53:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:37,760 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:53:37,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:53:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:53:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:53:37,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:37,761 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-09-30 20:53:37,761 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:37,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-09-30 20:53:37,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:37,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:37,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:37,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:37,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:37,769 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:37,769 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:37,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:37,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:38,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:38,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:38,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:39,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:39,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-30 20:53:39,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:53:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:53:39,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:39,407 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 20:53:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:42,705 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:53:42,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:53:42,706 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 20:53:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:42,706 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:53:42,706 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:53:42,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:42,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:53:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:53:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:53:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:53:42,712 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:53:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:42,712 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:53:42,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:53:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:53:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:53:42,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:42,713 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-09-30 20:53:42,713 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:42,714 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:42,714 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-09-30 20:53:42,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:42,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:42,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:42,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:42,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:42,721 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:42,722 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:42,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:42,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:43,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:53:43,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:43,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:43,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:43,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-30 20:53:43,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:53:43,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:53:43,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:43,937 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 20:53:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:47,448 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:53:47,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:53:47,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 20:53:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:47,449 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:53:47,449 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:53:47,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:53:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:53:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:53:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:53:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:53:47,455 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:53:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:47,455 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:53:47,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:53:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:53:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:53:47,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:47,456 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-09-30 20:53:47,457 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:47,457 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-09-30 20:53:47,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:47,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:47,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:47,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:47,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:47,464 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:47,464 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:47,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:47,478 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:47,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:47,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:47,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:48,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:48,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-30 20:53:48,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:53:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:53:48,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:48,804 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 20:53:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:52,566 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:53:52,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:53:52,566 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 20:53:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:52,567 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:53:52,567 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:53:52,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:53:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:53:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:53:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:53:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:53:52,573 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:53:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:52,573 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:53:52,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:53:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:53:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:53:52,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:52,574 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-09-30 20:53:52,574 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:52,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-09-30 20:53:52,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:52,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:52,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:52,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:52,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:52,582 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:52,582 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:52,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:52,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:53,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:53:53,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:53,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:53,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:53,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-30 20:53:53,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:53:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:53:53,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:53,893 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 20:53:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:57,873 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:53:57,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:53:57,873 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 20:53:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:57,874 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:53:57,874 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:53:57,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:53:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:53:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:53:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:53:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:53:57,879 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:53:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:57,880 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:53:57,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:53:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:53:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:53:57,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:57,880 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-09-30 20:53:57,881 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:53:57,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-09-30 20:53:57,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:57,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:57,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:57,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:57,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:57,888 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:53:57,888 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:53:57,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:53:57,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:58,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:53:58,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:58,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:59,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:53:59,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-30 20:53:59,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:53:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:53:59,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:59,332 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 20:54:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:03,605 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:54:03,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:54:03,606 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 20:54:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:03,607 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:54:03,607 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:54:03,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:54:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:54:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:54:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:54:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:54:03,612 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:54:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:03,612 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:54:03,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:54:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:54:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:54:03,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:03,613 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-09-30 20:54:03,613 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:03,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-09-30 20:54:03,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:03,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:03,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:03,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:03,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:03,621 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:03,621 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:03,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:03,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:04,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:05,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:05,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-30 20:54:05,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:54:05,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:54:05,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:05,129 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 20:54:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:09,633 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:54:09,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:54:09,634 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 20:54:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:09,634 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:54:09,635 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:54:09,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:54:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:54:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:54:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:54:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:54:09,640 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:54:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:09,641 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:54:09,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:54:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:54:09,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:54:09,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:09,641 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-09-30 20:54:09,642 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:09,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-09-30 20:54:09,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:09,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:09,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:09,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:09,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:09,648 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:09,648 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:09,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:09,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:10,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:10,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:10,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:11,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:11,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-30 20:54:11,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:54:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:54:11,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:11,315 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 20:54:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:16,065 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:54:16,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:54:16,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 20:54:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:16,066 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:54:16,066 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:54:16,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:54:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:54:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:54:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:54:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:54:16,071 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:54:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:16,071 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:54:16,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:54:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:54:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:54:16,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:16,072 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-09-30 20:54:16,072 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:16,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-09-30 20:54:16,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:16,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:16,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:16,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:16,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:16,079 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:16,080 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:16,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:16,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:16,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:54:16,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:16,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:17,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:17,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-30 20:54:17,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:54:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:54:17,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:17,720 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 20:54:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:22,728 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:54:22,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:54:22,728 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 20:54:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:22,729 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:54:22,729 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:54:22,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:54:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:54:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:54:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:54:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:54:22,733 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:54:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:22,734 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:54:22,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:54:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:54:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:54:22,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:22,735 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-09-30 20:54:22,735 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:22,735 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-09-30 20:54:22,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:22,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:22,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:22,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:22,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:22,747 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:22,747 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:22,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:22,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:23,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:23,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:23,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:24,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:24,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-30 20:54:24,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:54:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:54:24,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:24,580 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 20:54:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:29,878 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 20:54:29,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:54:29,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 20:54:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:29,880 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:54:29,880 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:54:29,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:54:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:54:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:54:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:54:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:54:29,885 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:54:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:29,885 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:54:29,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:54:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:54:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:54:29,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:29,886 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-09-30 20:54:29,886 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:29,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:29,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-09-30 20:54:29,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:29,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:29,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:29,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:29,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:29,893 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:29,893 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:29,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:29,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:30,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:54:30,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:30,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:31,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:31,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-30 20:54:31,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:54:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:54:31,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:31,912 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 20:54:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:37,488 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:54:37,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:54:37,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 20:54:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:37,489 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:54:37,489 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:54:37,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:54:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:54:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:54:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:54:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:54:37,494 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 20:54:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:37,494 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:54:37,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:54:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:54:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:54:37,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:37,495 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-09-30 20:54:37,495 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:37,495 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-09-30 20:54:37,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:37,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:37,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:37,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:37,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:37,502 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:37,502 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:37,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:37,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:38,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:54:38,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:38,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:39,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:39,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-30 20:54:39,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:54:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:54:39,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:39,690 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 20:54:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:45,570 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 20:54:45,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:54:45,570 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 20:54:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:45,571 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:54:45,571 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:54:45,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:54:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:54:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:54:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:54:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:54:45,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 20:54:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:45,576 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:54:45,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:54:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:54:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:54:45,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:45,576 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-09-30 20:54:45,577 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:45,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-09-30 20:54:45,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:45,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:45,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:45,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:45,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:45,584 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:45,585 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:45,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:45,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:46,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:48,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:48,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-30 20:54:48,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:54:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:54:48,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:48,100 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 20:54:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:54,280 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:54:54,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:54:54,281 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 20:54:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:54,281 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:54:54,282 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:54:54,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:54:54,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:54:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:54:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:54:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:54:54,286 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 20:54:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:54,286 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:54:54,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:54:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:54:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:54:54,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:54,287 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-09-30 20:54:54,287 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:54:54,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-09-30 20:54:54,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:54,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:54,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:54,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:54,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:54,294 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:54:54,294 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:54:54,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:54:54,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:55,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:55,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:55,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:56,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:54:56,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-30 20:54:56,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:54:56,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:54:56,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:56,510 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 20:55:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:03,026 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 20:55:03,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:55:03,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 20:55:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:03,027 INFO L225 Difference]: With dead ends: 46 [2018-09-30 20:55:03,027 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:55:03,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:55:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:55:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:55:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:55:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:55:03,031 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 20:55:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:03,031 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:55:03,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:55:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:55:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:55:03,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:03,032 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-09-30 20:55:03,032 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:55:03,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-09-30 20:55:03,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:03,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:03,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:03,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:03,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:03,038 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:55:03,038 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:55:03,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:55:03,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:04,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:55:04,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:04,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:05,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:55:05,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-30 20:55:05,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:55:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:55:05,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:05,614 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 20:55:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:12,452 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:55:12,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:55:12,452 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 20:55:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:12,453 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:55:12,453 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:55:12,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:55:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:55:12,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:55:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:55:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:55:12,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 20:55:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:12,458 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:55:12,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:55:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:55:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:55:12,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:12,458 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-09-30 20:55:12,459 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:55:12,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-09-30 20:55:12,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:12,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:12,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:12,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:12,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:12,465 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:55:12,465 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:55:12,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:55:12,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:13,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:13,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:13,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:15,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:55:15,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-30 20:55:15,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:55:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:55:15,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:15,159 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 20:55:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:22,303 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 20:55:22,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:55:22,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 20:55:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:22,305 INFO L225 Difference]: With dead ends: 48 [2018-09-30 20:55:22,305 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:55:22,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:55:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:55:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:55:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:55:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:55:22,309 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 20:55:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:22,310 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:55:22,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:55:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:55:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:55:22,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:22,310 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-09-30 20:55:22,311 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:55:22,311 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-09-30 20:55:22,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:22,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:22,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:22,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:22,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:22,317 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:55:22,317 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:55:22,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:55:22,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:55:23,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:55:23,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:23,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:25,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:55:25,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-30 20:55:25,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:55:25,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:55:25,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:25,223 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 20:55:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:32,719 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:55:32,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:55:32,720 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 20:55:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:32,720 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:55:32,720 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:55:32,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:55:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:55:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:55:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:55:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:55:32,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 20:55:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:32,726 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:55:32,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:55:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:55:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:55:32,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:32,727 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-09-30 20:55:32,727 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:55:32,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-09-30 20:55:32,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:32,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:32,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:32,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:32,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:32,734 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:55:32,734 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:55:32,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:55:32,753 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:55:34,514 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:55:34,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:34,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:35,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:55:35,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-30 20:55:35,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:55:35,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:55:35,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:35,963 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 20:55:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:43,817 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 20:55:43,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:55:43,817 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 20:55:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:43,818 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:55:43,818 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:55:43,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:55:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:55:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:55:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:55:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:55:43,823 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 20:55:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:43,823 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:55:43,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:55:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:55:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:55:43,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:43,824 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-09-30 20:55:43,824 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:55:43,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-09-30 20:55:43,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:43,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:43,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:43,831 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:55:43,831 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:55:43,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:55:43,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:45,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:46,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:55:46,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-30 20:55:46,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:55:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:55:46,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:46,916 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 20:55:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:55,053 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:55:55,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:55:55,053 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 20:55:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:55,054 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:55:55,054 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:55:55,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:55:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:55:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:55:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:55:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:55:55,060 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 20:55:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:55,060 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:55:55,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:55:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:55:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:55:55,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:55,061 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-09-30 20:55:55,061 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:55:55,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-09-30 20:55:55,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:55,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:55,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:55,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:55,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:55,069 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:55:55,069 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:55:55,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:55:55,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:56,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:56,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:56,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:58,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:55:58,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-30 20:55:58,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:55:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:55:58,341 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:58,341 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 20:56:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:06,841 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 20:56:06,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:56:06,842 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 20:56:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:06,843 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:56:06,843 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:56:06,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:56:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:56:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:56:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:56:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:56:06,847 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 20:56:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:06,848 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:56:06,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:56:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:56:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:56:06,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:06,849 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-09-30 20:56:06,849 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:56:06,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-09-30 20:56:06,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:06,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:06,856 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:56:06,856 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:56:06,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:56:06,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:56:08,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:56:08,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:08,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:10,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:56:10,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-30 20:56:10,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:56:10,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:56:10,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:10,642 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 20:56:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:19,506 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:56:19,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:56:19,507 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 20:56:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:19,508 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:56:19,508 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:56:19,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:56:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:56:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:56:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:56:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:56:19,512 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 20:56:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:19,512 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:56:19,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:56:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:56:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:56:19,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:19,512 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-09-30 20:56:19,513 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:56:19,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-09-30 20:56:19,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:19,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:19,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:19,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:19,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:19,519 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:56:19,520 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:56:19,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:56:19,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:56:21,841 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:56:21,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:21,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:23,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:56:23,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-30 20:56:23,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:56:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:56:23,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:23,530 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 20:56:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:32,781 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 20:56:32,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:56:32,782 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 20:56:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:32,783 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:56:32,783 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:56:32,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:56:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:56:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:56:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:56:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:56:32,789 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 20:56:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:32,789 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:56:32,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:56:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:56:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:56:32,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:32,789 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-09-30 20:56:32,790 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:56:32,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-09-30 20:56:32,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:32,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:32,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:32,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:32,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:32,797 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:56:32,797 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:56:32,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:56:32,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:56:35,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:56:35,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:35,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:37,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:56:37,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-30 20:56:37,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:56:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:56:37,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:37,233 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 20:56:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:56:46,808 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:56:46,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:56:46,808 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 20:56:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:56:46,809 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:56:46,809 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:56:46,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:56:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:56:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:56:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:56:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:56:46,815 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 20:56:46,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:56:46,816 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:56:46,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:56:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:56:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:56:46,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:56:46,816 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-09-30 20:56:46,817 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:56:46,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:56:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-09-30 20:56:46,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:56:46,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:56:46,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:46,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:56:46,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:56:46,823 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:56:46,823 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:56:46,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:56:46,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:56:49,570 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:56:49,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:56:49,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:56:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:56:51,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:56:51,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-30 20:56:51,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:56:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:56:51,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:56:51,394 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 20:57:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:57:01,352 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 20:57:01,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:57:01,352 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 20:57:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:57:01,353 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:57:01,353 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:57:01,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:57:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:57:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:57:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:57:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:57:01,358 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 20:57:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:57:01,359 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:57:01,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:57:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:57:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:57:01,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:57:01,359 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-09-30 20:57:01,360 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-30 20:57:01,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:57:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-09-30 20:57:01,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:57:01,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:57:01,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:57:01,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:57:01,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:57:01,366 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 20:57:01,366 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 20:57:01,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 20:57:01,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:57:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:57:03,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:57:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:57:05,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:57:05,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-30 20:57:05,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:57:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:57:05,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:57:05,967 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. Received shutdown request... [2018-09-30 20:57:06,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:57:06,250 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:57:06,255 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:57:06,255 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:57:06 BoogieIcfgContainer [2018-09-30 20:57:06,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:57:06,256 INFO L168 Benchmark]: Toolchain (without parser) took 258340.21 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -49.8 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 68.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:57:06,257 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 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. [2018-09-30 20:57:06,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.82 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. [2018-09-30 20:57:06,258 INFO L168 Benchmark]: Boogie Preprocessor took 21.83 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. [2018-09-30 20:57:06,259 INFO L168 Benchmark]: RCFGBuilder took 306.89 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. [2018-09-30 20:57:06,260 INFO L168 Benchmark]: TraceAbstraction took 257964.91 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -49.8 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 47.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:57:06,263 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 0.24 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 40.82 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 21.83 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 306.89 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 257964.91 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -49.8 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 47.4 MB). There was no memory consumed. 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 constructing difference of abstraction (54states) and FLOYD_HOARE automaton (currently 3 states, 53 states before enhancement), while ReachableStatesComputation was computing reachable states (2 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 257.9s OverallTime, 50 OverallIterations, 49 TraceHistogramMax, 181.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 147 SDtfs, 56 SDslu, 49 SDs, 0 SdLazy, 46852 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1424 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=49, 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: 0.2s AutomataMinimizationTime, 49 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 32.8s SatisfiabilityAnalysisTime, 40.3s InterpolantComputationTime, 1425 NumberOfCodeBlocks, 1425 NumberOfCodeBlocksAsserted, 374 NumberOfCheckSat, 1375 ConstructedInterpolants, 0 QuantifiedInterpolants, 513973 SizeOfPredicates, 50 NumberOfNonLiveVariables, 6575 ConjunctsInSsa, 5200 ConjunctsInUnsatCore, 50 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20825 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-0-2018-09-30_20-57-06-274.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-0-2018-09-30_20-57-06-274.csv Completed graceful shutdown