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/20170304-DifficultPathPrograms/overflow1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:14:07,859 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:14:07,861 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:14:07,873 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:14:07,873 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:14:07,874 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:14:07,875 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:14:07,877 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:14:07,879 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:14:07,880 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:14:07,880 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:14:07,881 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:14:07,882 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:14:07,883 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:14:07,884 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:14:07,885 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:14:07,885 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:14:07,887 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:14:07,889 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:14:07,891 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:14:07,892 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:14:07,893 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:14:07,896 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-02 12:14:07,896 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-02 12:14:07,896 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-02 12:14:07,897 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-02 12:14:07,898 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-02 12:14:07,899 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-02 12:14:07,900 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-02 12:14:07,901 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-02 12:14:07,901 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-02 12:14:07,902 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-02 12:14:07,902 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-02 12:14:07,902 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-02 12:14:07,903 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-02 12:14:07,904 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-02 12:14:07,904 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:14:07,920 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:14:07,920 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:14:07,921 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:14:07,921 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:14:07,922 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:14:07,922 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:14:07,922 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:14:07,923 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:14:07,923 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:14:07,923 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:14:07,923 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:14:07,923 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:14:07,924 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:14:07,924 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:14:07,924 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:14:07,924 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:14:07,924 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:14:07,924 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:14:07,925 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:14:07,925 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:14:07,925 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:14:07,925 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:14:07,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:14:07,926 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:14:07,926 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:14:07,926 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:14:07,926 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:14:07,926 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:14:07,927 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:14:07,927 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:14:07,927 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:14:07,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:14:07,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:14:07,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:14:07,994 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:14:07,995 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:14:07,996 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/overflow1.i_3.bpl [2018-10-02 12:14:07,996 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/overflow1.i_3.bpl' [2018-10-02 12:14:08,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:14:08,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:14:08,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:14:08,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:14:08,053 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:14:08,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:14:08,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:14:08,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:14:08,092 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:14:08,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... [2018-10-02 12:14:08,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:14:08,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:14:08,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:14:08,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:14:08,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:14:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:14:08,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:14:08,383 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:14:08,383 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:14:08 BoogieIcfgContainer [2018-10-02 12:14:08,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:14:08,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:14:08,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:14:08,391 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:14:08,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:14:08" (1/2) ... [2018-10-02 12:14:08,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b000682 and model type overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:14:08, skipping insertion in model container [2018-10-02 12:14:08,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:14:08" (2/2) ... [2018-10-02 12:14:08,394 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bpl [2018-10-02 12:14:08,405 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:14:08,416 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:14:08,470 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:14:08,471 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:14:08,471 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:14:08,472 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:14:08,472 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:14:08,472 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:14:08,472 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:14:08,472 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:14:08,473 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:14:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 12:14:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:14:08,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:08,512 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:14:08,513 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:08,522 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 12:14:08,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:08,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:08,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:08,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:08,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:08,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:14:08,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 12:14:08,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:14:08,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:14:08,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:08,742 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 12:14:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:08,855 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 12:14:08,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:14:08,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 12:14:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:08,887 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:14:08,887 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 12:14:08,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:14:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 12:14:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 12:14:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:14:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:14:08,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 12:14:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:08,944 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:14:08,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:14:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:14:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:14:08,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:08,944 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 12:14:08,945 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:08,945 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 12:14:08,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:08,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:08,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:08,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:08,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:09,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:09,031 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:09,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:09,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:09,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:09,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 12:14:09,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:14:09,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:14:09,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:09,151 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-02 12:14:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:09,255 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:14:09,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:14:09,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 12:14:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:09,256 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:14:09,256 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:14:09,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:14:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:14:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:14:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:14:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:14:09,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 12:14:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:09,261 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:14:09,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:14:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:14:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:14:09,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:09,263 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 12:14:09,263 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:09,263 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-02 12:14:09,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:09,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:09,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:09,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:09,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:09,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:09,376 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:09,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:14:09,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:14:09,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:09,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:09,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:09,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 12:14:09,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 12:14:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 12:14:09,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:09,538 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-02 12:14:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:09,898 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:14:09,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:14:09,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 12:14:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:09,900 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:14:09,900 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:14:09,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:14:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:14:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:14:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:14:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:14:09,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 12:14:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:09,905 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:14:09,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 12:14:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:14:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:14:09,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:09,906 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 12:14:09,907 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:09,907 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-02 12:14:09,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:09,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:09,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:09,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:09,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:10,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:10,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:10,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:14:10,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:14:10,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:10,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:10,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:10,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 12:14:10,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:14:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:14:10,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:10,184 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-02 12:14:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:10,434 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:14:10,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:14:10,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 12:14:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:10,437 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:14:10,437 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:14:10,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:14:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:14:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:14:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:14:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:14:10,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 12:14:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:10,446 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:14:10,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:14:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:14:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:14:10,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:10,446 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 12:14:10,447 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:10,447 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-02 12:14:10,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:10,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:10,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:10,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:10,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:10,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:10,555 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:10,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:14:10,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:14:10,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:10,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:10,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:10,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 12:14:10,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:14:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:14:10,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:10,720 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-02 12:14:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:11,290 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:14:11,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:14:11,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 12:14:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:11,292 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:14:11,292 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:14:11,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:14:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:14:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 12:14:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:14:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:14:11,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 12:14:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:11,298 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:14:11,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:14:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:14:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:14:11,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:11,299 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 12:14:11,299 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:11,300 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-02 12:14:11,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:11,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:11,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:11,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:11,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:11,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:11,458 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:11,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:14:11,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:14:11,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:11,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:11,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:11,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 12:14:11,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:14:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:14:11,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:11,600 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-02 12:14:11,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:11,925 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:14:11,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:14:11,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 12:14:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:11,927 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:14:11,927 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:14:11,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:14:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:14:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:14:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:14:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:14:11,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 12:14:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:11,933 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:14:11,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:14:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:14:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:14:11,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:11,934 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 12:14:11,935 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:11,935 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-02 12:14:11,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:11,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:11,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:11,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:11,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:12,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:12,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:12,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:14:12,130 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:14:12,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:12,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:12,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:12,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 12:14:12,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 12:14:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 12:14:12,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:12,250 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-02 12:14:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:12,554 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:14:12,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:14:12,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 12:14:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:12,558 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:14:12,558 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:14:12,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:14:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:14:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 12:14:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:14:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:14:12,563 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 12:14:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:12,563 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:14:12,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 12:14:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:14:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:14:12,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:12,564 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 12:14:12,565 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:12,565 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-02 12:14:12,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:12,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:12,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:12,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:12,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:12,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:12,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:12,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:12,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:12,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:12,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 12:14:12,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:14:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:14:12,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:12,833 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-02 12:14:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:13,319 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:14:13,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:14:13,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 12:14:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:13,321 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:14:13,321 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:14:13,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:14:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:14:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:14:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:14:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:14:13,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 12:14:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:13,328 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:14:13,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:14:13,328 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:14:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:14:13,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:13,329 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 12:14:13,329 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:13,329 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-02 12:14:13,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:13,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:13,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:13,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:13,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:13,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:13,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:13,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:14:13,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:14:13,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:13,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:13,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:13,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 12:14:13,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:14:13,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:14:13,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:13,626 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-02 12:14:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:14,025 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:14:14,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:14:14,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 12:14:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:14,027 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:14:14,027 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:14:14,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime [2018-10-02 12:14:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:14:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 12:14:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:14:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:14:14,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 12:14:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:14,034 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:14:14,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:14:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:14:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:14:14,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:14,036 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 12:14:14,036 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:14,036 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:14,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-02 12:14:14,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:14,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:14,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:14,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:14,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:14,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:14,310 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:14,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:14:14,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 12:14:14,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:14,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:14,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:14,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 12:14:14,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:14:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:14:14,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:14,451 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-02 12:14:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:15,022 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:14:15,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:14:15,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 12:14:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:15,023 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:14:15,023 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:14:15,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:14:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:14:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:14:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:14:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:14:15,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 12:14:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:15,030 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:14:15,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:14:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:14:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:14:15,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:15,031 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 12:14:15,031 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:15,032 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-02 12:14:15,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:15,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:15,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:15,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:15,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:15,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:15,262 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:15,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:14:15,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:14:15,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:15,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:15,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:15,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 12:14:15,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 12:14:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 12:14:15,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:15,454 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-02 12:14:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:16,254 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:14:16,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:14:16,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 12:14:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:16,256 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:14:16,256 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:14:16,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:14:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:14:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 12:14:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:14:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:14:16,263 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 12:14:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:16,263 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:14:16,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 12:14:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:14:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:14:16,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:16,265 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 12:14:16,265 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:16,265 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-02 12:14:16,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:16,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:16,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:16,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:16,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:16,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:16,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:14:16,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:15:05,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:15:05,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:15:05,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:06,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:06,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 12:15:06,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:15:06,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:15:06,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:06,311 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-02 12:15:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:06,966 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:15:06,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:15:06,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 12:15:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:06,969 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:15:06,969 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:15:06,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime [2018-10-02 12:15:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:15:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:15:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:15:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:15:06,974 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 12:15:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:06,974 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:15:06,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:15:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:15:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:15:06,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:06,975 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 12:15:06,975 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:06,975 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-02 12:15:06,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:06,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:06,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:06,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:15:06,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:07,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:07,304 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:15:07,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:15:32,129 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:15:32,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:15:32,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:32,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:32,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 12:15:32,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:15:32,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:15:32,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:32,314 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-02 12:15:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:33,032 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:15:33,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:15:33,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 12:15:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:33,034 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:15:33,034 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:15:33,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:15:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:15:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 12:15:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:15:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:15:33,040 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 12:15:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:33,040 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:15:33,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:15:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:15:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:15:33,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:33,041 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 12:15:33,042 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:33,042 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-02 12:15:33,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:33,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:33,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:33,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:15:33,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:33,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:33,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:15:33,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:15:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:33,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:34,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:34,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 12:15:34,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:15:34,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:15:34,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:34,073 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-02 12:15:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:35,020 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:15:35,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:15:35,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 12:15:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:35,021 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:15:35,021 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:15:35,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime [2018-10-02 12:15:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:15:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:15:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:15:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:15:35,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 12:15:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:35,030 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:15:35,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:15:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:15:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:15:35,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:35,031 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 12:15:35,032 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:35,032 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-02 12:15:35,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:35,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:35,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:15:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:35,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:35,280 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:15:35,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:15:35,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:15:35,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:15:35,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:35,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:35,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 12:15:35,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:15:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:15:35,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:35,840 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-02 12:15:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:36,817 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:15:36,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:15:36,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 12:15:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:36,818 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:15:36,819 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:15:36,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime [2018-10-02 12:15:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:15:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 12:15:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:15:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:15:36,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 12:15:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:36,825 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:15:36,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:15:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:15:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:15:36,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:36,826 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 12:15:36,826 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:36,827 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-02 12:15:36,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:36,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:36,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:36,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:15:36,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:37,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:37,463 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:15:37,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:16:46,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 12:16:46,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:46,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:46,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:46,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 12:16:46,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:16:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:16:46,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:46,481 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-02 12:16:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:47,572 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:16:47,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:16:47,575 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 12:16:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:47,576 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:16:47,576 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:16:47,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:16:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:16:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:16:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:16:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 12:16:47,581 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-02 12:16:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:47,581 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 12:16:47,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:16:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 12:16:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:16:47,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:47,582 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-02 12:16:47,582 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:47,583 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-02 12:16:47,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:47,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:47,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:47,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:48,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:48,037 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:48,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:16:48,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:16:48,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:48,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:48,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:48,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 12:16:48,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 12:16:48,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 12:16:48,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:48,171 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-02 12:16:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:49,254 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:16:49,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:16:49,264 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 12:16:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:49,264 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:16:49,264 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:16:49,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:16:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:16:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 12:16:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:16:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 12:16:49,270 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-02 12:16:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:49,270 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 12:16:49,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 12:16:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 12:16:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:16:49,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:49,271 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 12:16:49,271 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:49,271 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-02 12:16:49,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:49,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:49,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:49,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:49,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:49,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:49,584 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:16:49,592 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:46,055 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 12:18:46,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:46,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:47,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:47,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 12:18:47,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:18:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:18:47,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:47,069 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-02 12:18:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:48,519 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:18:48,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:18:48,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 12:18:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:48,520 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:18:48,520 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:18:48,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:18:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:18:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:18:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:18:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 12:18:48,526 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-02 12:18:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:48,526 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 12:18:48,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:18:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 12:18:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:18:48,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:48,527 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-02 12:18:48,527 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:48,528 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:48,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-02 12:18:48,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:48,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:48,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:48,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:48,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:49,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:49,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:49,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown