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/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:24:28,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:24:28,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:24:28,678 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:24:28,679 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:24:28,680 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:24:28,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:24:28,684 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:24:28,686 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:24:28,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:24:28,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 14:24:28,688 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 14:24:28,689 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 14:24:28,690 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 14:24:28,691 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 14:24:28,692 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 14:24:28,693 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 14:24:28,695 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 14:24:28,697 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 14:24:28,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 14:24:28,699 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 14:24:28,701 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 14:24:28,703 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 14:24:28,712 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 [2018-10-04 14:24:28,727 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:24:28,727 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:24:28,728 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:24:28,728 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:24:28,729 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:24:28,729 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:24:28,729 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:24:28,729 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:24:28,729 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:24:28,730 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:24:28,730 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:24:28,730 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:24:28,730 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:24:28,731 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:24:28,731 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:24:28,731 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:24:28,731 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:24:28,731 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:24:28,732 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:24:28,732 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:24:28,732 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:24:28,732 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:24:28,732 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:24:28,733 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:24:28,733 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:24:28,733 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:24:28,733 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:24:28,733 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:24:28,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:24:28,734 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:24:28,734 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:24:28,785 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:24:28,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:24:28,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:24:28,809 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:24:28,810 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:24:28,811 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-10-04 14:24:28,811 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-10-04 14:24:28,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:24:28,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:24:28,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:24:28,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:24:28,870 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:24:28,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:24:28,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:24:28,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:24:28,912 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:24:28,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/1) ... [2018-10-04 14:24:28,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:24:28,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:24:28,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:24:28,933 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:24:28,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (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 [2018-10-04 14:24:29,010 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 14:24:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:24:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:24:29,212 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:24:29,213 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:24:29 BoogieIcfgContainer [2018-10-04 14:24:29,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:24:29,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:24:29,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:24:29,222 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:24:29,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:24:28" (1/2) ... [2018-10-04 14:24:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116261c3 and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:24:29, skipping insertion in model container [2018-10-04 14:24:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:24:29" (2/2) ... [2018-10-04 14:24:29,226 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-10-04 14:24:29,235 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:24:29,242 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:24:29,290 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:24:29,291 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:24:29,291 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:24:29,292 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:24:29,292 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:24:29,292 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:24:29,292 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:24:29,292 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:24:29,293 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:24:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 14:24:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 14:24:29,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:29,315 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 14:24:29,317 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:29,326 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:29,327 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-10-04 14:24:29,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:29,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:29,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:29,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:29,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:29,499 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:24:29,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 14:24:29,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:24:29,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:24:29,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:29,518 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 14:24:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:29,556 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-04 14:24:29,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:24:29,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 14:24:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:29,570 INFO L225 Difference]: With dead ends: 9 [2018-10-04 14:24:29,570 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 14:24:29,573 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 1 [2018-10-04 14:24:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 14:24:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 14:24:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 14:24:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 14:24:29,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 14:24:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:29,607 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 14:24:29,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:24:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 14:24:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:24:29,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:29,608 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:24:29,609 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:29,609 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-10-04 14:24:29,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:29,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:29,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:29,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:29,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:29,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:29,768 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 [2018-10-04 14:24:29,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:29,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:29,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:29,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:24:29,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:24:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:24:29,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:29,969 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-04 14:24:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:30,026 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 14:24:30,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:24:30,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 14:24:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:30,027 INFO L225 Difference]: With dead ends: 8 [2018-10-04 14:24:30,028 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 14:24:30,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-04 14:24:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 14:24:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 14:24:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 14:24:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 14:24:30,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 14:24:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:30,031 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 14:24:30,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:24:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 14:24:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:24:30,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:30,032 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 14:24:30,033 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:30,033 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-10-04 14:24:30,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:30,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:30,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:30,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:30,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:30,144 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 [2018-10-04 14:24:30,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:30,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:30,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:30,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:30,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:30,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:24:30,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:24:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:24:30,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:30,240 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 14:24:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:30,262 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 14:24:30,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:24:30,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 14:24:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:30,264 INFO L225 Difference]: With dead ends: 9 [2018-10-04 14:24:30,264 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:24:30,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 14:24:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:24:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:24:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:24:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:24:30,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 14:24:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:30,267 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:24:30,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:24:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:24:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:24:30,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:30,269 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 14:24:30,269 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:30,269 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-10-04 14:24:30,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:30,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:30,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:30,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:30,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:30,355 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 [2018-10-04 14:24:30,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:30,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:24:30,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:30,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:30,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:30,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:24:30,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:24:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:24:30,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:30,498 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 14:24:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:30,561 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 14:24:30,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:24:30,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 14:24:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:30,562 INFO L225 Difference]: With dead ends: 10 [2018-10-04 14:24:30,562 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:24:30,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 14:24:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:24:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:24:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:24:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 14:24:30,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 14:24:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:30,566 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 14:24:30,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:24:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 14:24:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 14:24:30,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:30,567 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 14:24:30,567 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:30,567 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-10-04 14:24:30,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:30,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:30,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:30,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:30,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:30,836 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 [2018-10-04 14:24:30,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:30,856 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:30,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:30,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:30,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:30,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:24:30,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:24:30,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:24:30,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:30,926 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 14:24:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:30,976 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 14:24:30,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:24:30,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 14:24:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:30,978 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:24:30,978 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:24:30,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-04 14:24:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:24:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:24:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:24:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:24:30,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 14:24:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:30,983 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:24:30,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:24:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:24:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:24:30,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:30,984 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 14:24:30,984 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:30,984 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-10-04 14:24:30,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:30,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:30,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:30,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:31,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:31,207 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 [2018-10-04 14:24:31,231 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:31,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:24:31,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:31,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:31,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:31,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:24:31,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:24:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:24:31,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:31,325 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 14:24:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:31,356 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 14:24:31,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:24:31,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 14:24:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:31,357 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:24:31,357 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:24:31,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 14:24:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:24:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 14:24:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:24:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 14:24:31,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 14:24:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:31,362 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 14:24:31,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:24:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 14:24:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:24:31,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:31,363 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 14:24:31,363 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:31,364 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-10-04 14:24:31,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:31,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:31,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:31,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:31,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:31,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:31,478 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 [2018-10-04 14:24:31,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:24:31,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 14:24:31,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:31,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:31,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:31,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:24:31,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:24:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:24:31,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:31,564 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 14:24:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:31,591 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 14:24:31,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:24:31,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 14:24:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:31,592 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:24:31,593 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:24:31,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 14:24:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:24:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:24:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:24:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:24:31,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 14:24:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:31,596 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:24:31,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:24:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:24:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:24:31,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:31,597 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 14:24:31,598 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:31,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:31,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-10-04 14:24:31,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:31,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:31,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:31,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:31,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:32,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:32,246 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 [2018-10-04 14:24:32,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:32,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:32,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:32,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:24:32,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:24:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:24:32,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:32,344 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 14:24:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:32,386 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 14:24:32,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:24:32,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 14:24:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:32,388 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:24:32,388 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 14:24:32,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 8 [2018-10-04 14:24:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 14:24:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 14:24:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:24:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 14:24:32,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 14:24:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:32,392 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 14:24:32,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:24:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 14:24:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:24:32,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:32,393 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 14:24:32,393 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:32,393 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-10-04 14:24:32,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:32,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:32,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:32,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:32,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:32,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:32,570 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 [2018-10-04 14:24:32,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:32,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:32,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:32,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:32,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:32,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:24:32,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:24:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:24:32,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:32,743 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 14:24:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:32,794 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 14:24:32,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:24:32,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 14:24:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:32,796 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:24:32,796 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:24:32,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 9 [2018-10-04 14:24:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:24:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:24:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:24:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:24:32,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 14:24:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:32,799 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:24:32,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:24:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:24:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:24:32,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:32,800 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 14:24:32,800 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:32,801 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:32,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-10-04 14:24:32,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:32,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:32,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:32,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:32,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:32,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:32,966 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 [2018-10-04 14:24:32,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:32,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:24:32,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:33,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:33,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:33,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:24:33,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:24:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:24:33,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:33,076 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 14:24:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:33,118 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 14:24:33,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:24:33,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 14:24:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:33,119 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:24:33,119 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:24:33,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 10 [2018-10-04 14:24:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:24:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 14:24:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:24:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 14:24:33,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 14:24:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:33,123 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 14:24:33,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:24:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 14:24:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 14:24:33,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:33,124 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 14:24:33,124 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:33,124 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-10-04 14:24:33,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:33,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:33,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:33,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:33,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:33,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:33,359 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 [2018-10-04 14:24:33,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:33,378 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:33,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:33,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:33,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:33,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:24:33,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:24:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:24:33,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:33,447 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 14:24:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:33,493 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 14:24:33,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:24:33,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 14:24:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:33,497 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:24:33,498 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:24:33,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 14:24:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:24:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:24:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:24:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:24:33,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 14:24:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:33,502 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:24:33,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:24:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:24:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:24:33,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:33,503 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 14:24:33,503 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:33,503 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-10-04 14:24:33,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:33,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:33,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:33,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:33,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:33,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:33,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:24:33,690 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:33,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:24:33,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:33,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:33,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:33,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:24:33,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:24:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:24:33,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:33,778 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 14:24:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:33,828 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 14:24:33,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:24:33,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 14:24:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:33,829 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:24:33,830 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:24:33,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 12 [2018-10-04 14:24:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:24:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 14:24:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:24:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 14:24:33,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 14:24:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:33,834 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 14:24:33,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:24:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 14:24:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 14:24:33,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:33,835 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 14:24:33,835 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:33,835 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-10-04 14:24:33,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:33,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:33,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:33,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:33,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:33,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:33,982 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 [2018-10-04 14:24:33,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:24:34,009 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:24:34,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:34,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:34,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:34,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:24:34,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:24:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:24:34,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:34,091 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 14:24:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:34,124 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 14:24:34,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:24:34,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 14:24:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:34,125 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:24:34,126 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:24:34,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 13 [2018-10-04 14:24:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:24:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:24:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:24:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:24:34,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 14:24:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:24:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:24:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:24:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:24:34,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:34,131 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 14:24:34,131 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:34,131 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-10-04 14:24:34,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:34,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:34,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:34,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:34,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:34,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:34,342 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 [2018-10-04 14:24:34,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:34,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:34,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:34,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:24:34,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:24:34,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:24:34,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:34,454 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 14:24:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:34,635 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 14:24:34,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:24:34,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 14:24:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:34,636 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:24:34,637 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 14:24:34,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-04 14:24:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 14:24:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 14:24:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 14:24:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 14:24:34,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 14:24:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:34,642 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 14:24:34,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:24:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 14:24:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:24:34,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:34,643 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 14:24:34,643 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:34,643 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-10-04 14:24:34,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:34,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:34,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:34,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:34,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:35,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:35,035 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 [2018-10-04 14:24:35,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:35,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:35,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:35,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:35,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:35,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:24:35,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:24:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:24:35,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:35,147 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 14:24:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:35,212 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 14:24:35,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:24:35,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 14:24:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:35,213 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:24:35,214 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:24:35,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 15 [2018-10-04 14:24:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:24:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:24:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:24:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:24:35,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 14:24:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:35,218 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:24:35,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:24:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:24:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:24:35,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:35,219 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 14:24:35,219 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:35,219 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-10-04 14:24:35,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:35,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:35,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:35,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:35,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:35,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:35,642 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 [2018-10-04 14:24:35,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:35,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:24:35,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:35,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:35,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:35,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:24:35,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:24:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:24:35,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:35,802 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 14:24:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:35,998 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 14:24:35,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:24:35,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 14:24:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:36,000 INFO L225 Difference]: With dead ends: 22 [2018-10-04 14:24:36,000 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:24:36,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 16 [2018-10-04 14:24:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:24:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 14:24:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:24:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 14:24:36,004 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 14:24:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:36,005 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 14:24:36,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:24:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 14:24:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 14:24:36,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:36,006 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 14:24:36,006 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:36,006 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:36,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-10-04 14:24:36,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:36,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:36,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:36,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:36,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:36,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:36,329 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 [2018-10-04 14:24:36,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:36,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:36,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:36,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:36,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:36,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:24:36,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:24:36,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:24:36,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:36,569 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 14:24:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:36,632 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 14:24:36,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:24:36,633 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 14:24:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:36,633 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:24:36,634 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:24:36,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 14:24:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:24:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:24:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:24:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:24:36,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 14:24:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:36,637 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:24:36,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:24:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:24:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:24:36,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:36,638 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 14:24:36,639 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:36,639 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-10-04 14:24:36,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:36,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:36,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:36,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:36,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:37,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:37,093 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 [2018-10-04 14:24:37,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:37,117 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:24:37,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:37,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:37,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:37,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:24:37,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:24:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:24:37,229 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:37,229 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 14:24:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:37,270 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 14:24:37,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:24:37,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 14:24:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:37,271 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:24:37,271 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:24:37,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 18 [2018-10-04 14:24:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:24:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 14:24:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:24:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 14:24:37,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 14:24:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:37,275 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 14:24:37,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:24:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 14:24:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 14:24:37,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:37,276 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 14:24:37,277 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:37,277 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-10-04 14:24:37,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:37,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:37,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:37,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:37,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:37,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:37,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:24:37,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:24:37,694 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 14:24:37,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:37,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:37,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:37,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 14:24:37,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:24:37,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:24:37,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:37,884 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 14:24:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:37,927 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 14:24:37,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:24:37,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 14:24:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:37,929 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:24:37,929 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:24:37,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 19 [2018-10-04 14:24:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:24:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:24:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:24:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:24:37,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 14:24:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:37,934 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:24:37,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:24:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:24:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:24:37,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:37,935 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 14:24:37,935 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:37,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-10-04 14:24:37,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:37,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:37,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:37,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:37,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:38,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:38,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:38,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:38,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:38,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:38,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:24:38,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:24:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:24:38,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:38,547 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 14:24:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:38,593 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 14:24:38,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:24:38,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 14:24:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:38,595 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:24:38,595 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 14:24:38,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 20 [2018-10-04 14:24:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 14:24:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 14:24:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:24:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 14:24:38,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 14:24:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:38,598 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 14:24:38,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:24:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 14:24:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:24:38,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:38,599 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 14:24:38,600 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:38,600 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-10-04 14:24:38,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:38,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:38,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:38,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:38,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:39,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:39,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:39,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:39,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:39,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:39,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:39,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:39,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:24:39,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:24:39,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:24:39,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:39,303 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 14:24:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:39,349 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 14:24:39,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:24:39,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 14:24:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:39,350 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:24:39,351 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:24:39,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 21 [2018-10-04 14:24:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:24:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:24:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:24:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:24:39,356 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 14:24:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:39,356 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:24:39,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:24:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:24:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:24:39,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:39,358 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 14:24:39,358 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:39,358 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-10-04 14:24:39,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:39,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:39,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:39,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:39,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:39,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:39,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:39,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:39,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:24:39,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:39,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:39,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:39,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 14:24:39,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:24:39,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:24:39,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:39,967 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 14:24:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:40,189 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 14:24:40,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:24:40,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 14:24:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:40,193 INFO L225 Difference]: With dead ends: 28 [2018-10-04 14:24:40,193 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:24:40,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 22 [2018-10-04 14:24:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:24:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 14:24:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 14:24:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 14:24:40,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 14:24:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:40,198 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 14:24:40,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:24:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 14:24:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 14:24:40,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:40,199 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 14:24:40,199 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:40,199 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-10-04 14:24:40,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:40,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:40,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:40,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:40,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:40,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:40,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:40,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:40,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:40,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:40,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:40,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:40,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 14:24:40,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:24:40,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:24:40,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:40,686 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 14:24:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:40,777 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 14:24:40,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:24:40,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 14:24:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:40,778 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:24:40,778 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:24:40,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 23 [2018-10-04 14:24:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:24:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:24:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:24:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:24:40,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 14:24:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:40,782 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:24:40,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:24:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:24:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:24:40,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:40,783 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 14:24:40,784 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:40,784 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-10-04 14:24:40,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:40,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:40,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:40,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:40,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:41,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:41,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:41,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:41,104 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:24:41,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:41,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:41,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:41,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:24:41,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:24:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:24:41,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:41,228 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 14:24:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:41,264 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 14:24:41,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:24:41,270 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 14:24:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:41,270 INFO L225 Difference]: With dead ends: 30 [2018-10-04 14:24:41,271 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:24:41,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 24 [2018-10-04 14:24:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:24:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 14:24:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:24:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 14:24:41,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 14:24:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:41,275 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 14:24:41,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:24:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 14:24:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 14:24:41,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:41,277 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 14:24:41,278 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:41,278 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:41,278 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-10-04 14:24:41,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:41,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:41,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:41,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:41,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:41,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:41,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:41,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:24:41,609 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:24:41,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:41,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:41,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:41,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 14:24:41,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:24:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:24:41,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:41,731 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 14:24:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:41,819 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 14:24:41,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:24:41,821 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 14:24:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:41,821 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:24:41,821 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:24:41,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 25 [2018-10-04 14:24:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:24:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:24:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:24:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:24:41,825 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 14:24:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:41,825 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:24:41,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:24:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:24:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:24:41,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:41,826 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 14:24:41,827 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:41,827 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-10-04 14:24:41,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:41,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:41,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:41,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:41,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:42,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:42,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:42,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:42,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:42,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:42,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:24:42,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:24:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:24:42,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:42,365 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 14:24:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:42,416 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 14:24:42,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:24:42,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 14:24:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:42,417 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:24:42,418 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 14:24:42,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 26 [2018-10-04 14:24:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 14:24:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 14:24:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 14:24:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 14:24:42,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 14:24:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:42,422 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 14:24:42,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:24:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 14:24:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:24:42,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:42,423 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 14:24:42,423 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:42,423 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-10-04 14:24:42,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:42,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:42,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:42,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:42,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:42,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:42,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:42,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:42,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:42,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:42,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:43,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:43,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:24:43,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:24:43,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:24:43,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:43,077 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 14:24:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:43,162 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 14:24:43,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:24:43,163 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 14:24:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:43,164 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:24:43,164 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:24:43,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 27 [2018-10-04 14:24:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:24:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:24:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:24:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:24:43,168 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 14:24:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:43,169 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:24:43,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:24:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:24:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:24:43,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:43,169 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 14:24:43,170 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:43,170 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:43,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-10-04 14:24:43,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:43,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:43,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:43,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:43,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:43,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:43,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:43,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:43,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:24:43,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:43,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:43,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:43,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 14:24:43,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:24:43,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:24:43,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:43,872 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 14:24:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:43,920 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 14:24:43,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:24:43,921 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 14:24:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:43,922 INFO L225 Difference]: With dead ends: 34 [2018-10-04 14:24:43,922 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:24:43,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 28 [2018-10-04 14:24:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:24:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 14:24:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:24:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 14:24:43,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 14:24:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:43,927 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 14:24:43,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:24:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 14:24:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 14:24:43,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:43,928 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 14:24:43,928 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:43,928 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-10-04 14:24:43,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:43,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:43,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:43,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:43,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:44,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:44,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:44,247 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:44,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:44,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:44,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:44,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:44,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:24:44,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:24:44,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:24:44,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:44,366 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 14:24:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:44,416 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 14:24:44,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:24:44,416 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 14:24:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:44,417 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:24:44,417 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:24:44,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 29 [2018-10-04 14:24:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:24:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:24:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:24:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:24:44,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 14:24:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:44,422 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:24:44,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:24:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:24:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:24:44,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:44,423 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 14:24:44,423 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:44,423 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-10-04 14:24:44,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:44,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:44,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:44,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:44,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:44,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:44,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:44,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:44,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:24:44,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:44,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:45,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:45,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 14:24:45,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:24:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:24:45,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:45,077 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 14:24:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:45,145 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 14:24:45,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:24:45,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 14:24:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:45,146 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:24:45,146 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:24:45,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 30 [2018-10-04 14:24:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:24:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 14:24:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 14:24:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 14:24:45,150 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 14:24:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:45,150 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 14:24:45,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:24:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 14:24:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 14:24:45,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:45,151 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-04 14:24:45,151 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:45,151 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-10-04 14:24:45,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:45,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:45,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:45,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:45,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:45,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:24:45,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 14:24:45,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:45,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:46,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:46,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 14:24:46,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:24:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:24:46,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:46,089 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 14:24:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:46,202 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 14:24:46,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:24:46,202 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 14:24:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:46,203 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:24:46,203 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:24:46,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 31 [2018-10-04 14:24:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:24:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:24:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:24:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 14:24:46,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 14:24:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:46,207 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 14:24:46,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:24:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 14:24:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:24:46,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:46,208 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 14:24:46,208 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:46,208 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-10-04 14:24:46,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:46,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:46,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:46,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:46,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:46,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:46,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:46,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:46,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 14:24:46,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:24:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:24:46,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:46,755 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 14:24:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:46,814 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 14:24:46,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:24:46,815 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 14:24:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:46,815 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:24:46,816 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 14:24:46,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 32 [2018-10-04 14:24:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 14:24:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 14:24:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 14:24:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 14:24:46,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 14:24:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:46,821 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 14:24:46,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:24:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 14:24:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 14:24:46,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:46,822 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-04 14:24:46,822 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:46,822 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-10-04 14:24:46,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:46,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:46,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:46,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:46,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:48,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:48,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:48,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:48,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:48,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:48,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:48,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:48,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 14:24:48,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:24:48,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:24:48,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:48,354 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 14:24:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:48,411 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 14:24:48,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:24:48,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 14:24:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:48,412 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:24:48,412 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:24:48,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 33 [2018-10-04 14:24:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:24:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:24:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:24:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 14:24:48,416 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 14:24:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:48,416 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 14:24:48,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:24:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 14:24:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:24:48,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:48,417 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 14:24:48,417 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:48,418 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:48,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-10-04 14:24:48,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:48,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:48,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:48,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:48,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:48,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:48,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:48,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:48,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:24:48,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:48,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:49,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:49,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 14:24:49,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:24:49,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:24:49,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:49,126 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 14:24:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:49,240 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 14:24:49,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:24:49,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 14:24:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:49,241 INFO L225 Difference]: With dead ends: 40 [2018-10-04 14:24:49,241 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 14:24:49,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 34 [2018-10-04 14:24:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 14:24:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 14:24:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 14:24:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 14:24:49,244 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 14:24:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:49,245 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 14:24:49,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:24:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 14:24:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 14:24:49,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:49,245 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-04 14:24:49,246 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:49,246 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-10-04 14:24:49,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:49,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:49,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:49,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:49,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:50,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:50,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:50,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:50,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:50,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:50,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:50,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:50,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 14:24:50,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:24:50,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:24:50,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:50,624 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 14:24:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:50,715 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 14:24:50,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:24:50,716 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 14:24:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:50,716 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:24:50,716 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:24:50,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 35 [2018-10-04 14:24:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:24:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 14:24:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:24:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 14:24:50,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 14:24:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:50,720 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 14:24:50,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:24:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 14:24:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:24:50,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:50,721 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 14:24:50,722 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:50,722 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-10-04 14:24:50,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:50,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:50,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:51,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:51,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:51,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:51,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:24:51,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:51,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:51,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:51,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 14:24:51,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:24:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:24:51,677 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:51,677 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 14:24:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:51,771 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 14:24:51,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:24:51,772 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 14:24:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:51,773 INFO L225 Difference]: With dead ends: 42 [2018-10-04 14:24:51,773 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 14:24:51,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 36 [2018-10-04 14:24:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 14:24:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 14:24:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 14:24:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 14:24:51,776 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 14:24:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:51,776 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 14:24:51,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:24:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 14:24:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 14:24:51,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:51,777 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-04 14:24:51,777 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:51,777 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-10-04 14:24:51,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:51,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:51,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:51,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:51,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:52,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:52,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:52,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:24:52,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 14:24:52,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:52,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:53,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:53,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 14:24:53,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:24:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:24:53,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:53,360 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 14:24:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:53,423 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 14:24:53,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:24:53,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 14:24:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:53,425 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:24:53,425 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:24:53,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.5s impTime 37 [2018-10-04 14:24:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:24:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:24:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:24:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 14:24:53,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 14:24:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:53,430 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 14:24:53,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:24:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 14:24:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:24:53,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:53,431 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 14:24:53,433 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:53,433 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-10-04 14:24:53,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:53,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:53,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:53,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:53,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:54,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:54,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:54,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:54,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:54,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:54,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 14:24:54,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:24:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:24:54,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:54,443 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 14:24:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:54,580 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 14:24:54,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:24:54,581 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 14:24:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:54,581 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:24:54,581 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 14:24:54,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 38 [2018-10-04 14:24:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 14:24:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 14:24:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 14:24:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 14:24:54,598 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 14:24:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:54,599 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 14:24:54,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:24:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 14:24:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 14:24:54,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:54,601 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-04 14:24:54,601 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:54,601 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-10-04 14:24:54,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:54,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:54,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:54,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:24:54,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:55,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:55,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:55,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:24:55,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:24:55,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:55,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:56,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:56,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 14:24:56,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:24:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:24:56,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:56,073 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 14:24:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:56,143 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 14:24:56,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:24:56,144 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 14:24:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:56,144 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:24:56,145 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:24:56,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 39 [2018-10-04 14:24:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:24:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 14:24:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:24:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 14:24:56,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 14:24:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:56,147 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 14:24:56,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:24:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 14:24:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:24:56,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:56,148 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 14:24:56,148 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:56,148 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-10-04 14:24:56,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:56,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:56,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:56,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:56,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:56,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:56,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:24:56,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 14:24:56,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:56,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:56,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:56,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 14:24:56,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:24:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:24:56,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:56,897 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 14:24:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:56,989 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 14:24:56,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:24:56,989 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 14:24:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:56,990 INFO L225 Difference]: With dead ends: 46 [2018-10-04 14:24:56,990 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 14:24:56,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 40 [2018-10-04 14:24:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 14:24:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 14:24:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 14:24:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 14:24:56,993 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 14:24:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:56,993 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 14:24:56,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:24:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 14:24:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 14:24:56,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:56,994 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-04 14:24:56,995 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:56,995 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-10-04 14:24:56,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:56,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:56,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:56,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:56,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:58,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:58,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:58,467 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:24:58,490 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:24:58,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:58,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:58,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:58,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 14:24:58,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:24:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:24:58,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:58,593 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 14:24:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:24:58,684 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 14:24:58,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:24:58,685 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 14:24:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:24:58,686 INFO L225 Difference]: With dead ends: 47 [2018-10-04 14:24:58,686 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:24:58,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 41 [2018-10-04 14:24:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:24:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:24:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:24:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 14:24:58,689 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 14:24:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:24:58,689 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 14:24:58,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:24:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 14:24:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:24:58,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:24:58,689 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 14:24:58,690 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:24:58,690 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:24:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-10-04 14:24:58,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:24:58,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:24:58,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:58,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:24:58,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:24:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:24:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:59,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:24:59,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:24:59,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:24:59,756 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:24:59,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:24:59,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:24:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:24:59,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:24:59,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 14:24:59,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:24:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:24:59,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:24:59,890 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 14:25:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:00,162 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 14:25:00,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:25:00,163 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 14:25:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:00,164 INFO L225 Difference]: With dead ends: 48 [2018-10-04 14:25:00,164 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 14:25:00,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 42 [2018-10-04 14:25:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 14:25:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 14:25:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 14:25:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 14:25:00,167 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 14:25:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:00,167 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 14:25:00,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:25:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 14:25:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 14:25:00,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:00,168 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-04 14:25:00,168 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:00,168 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:00,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-10-04 14:25:00,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:00,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:00,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:00,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:00,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:01,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:01,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:01,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:25:01,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 14:25:01,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:01,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:01,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:01,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 14:25:01,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:25:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:25:01,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:01,746 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 14:25:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:01,821 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 14:25:01,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:25:01,821 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 14:25:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:01,822 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:25:01,822 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:25:01,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 43 [2018-10-04 14:25:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:25:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 14:25:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:25:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 14:25:01,825 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 14:25:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:01,826 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 14:25:01,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:25:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 14:25:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:25:01,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:01,826 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 14:25:01,827 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:01,827 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-10-04 14:25:01,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:01,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:01,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:01,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:01,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:02,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:02,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:02,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:02,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:02,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:02,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 14:25:02,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:25:03,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:25:03,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:03,000 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 14:25:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:03,083 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 14:25:03,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:25:03,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 14:25:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:03,085 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:25:03,085 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 14:25:03,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 44 [2018-10-04 14:25:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 14:25:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 14:25:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 14:25:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 14:25:03,087 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 14:25:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:03,088 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 14:25:03,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:25:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 14:25:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 14:25:03,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:03,088 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-04 14:25:03,089 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:03,089 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-10-04 14:25:03,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:03,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:03,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:03,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:03,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:04,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:04,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:04,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:25:04,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:25:04,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:04,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:04,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:04,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 14:25:04,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:25:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:25:04,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:04,282 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 14:25:04,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:04,412 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 14:25:04,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:25:04,412 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 14:25:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:04,413 INFO L225 Difference]: With dead ends: 51 [2018-10-04 14:25:04,413 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:25:04,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 45 [2018-10-04 14:25:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:25:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:25:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:25:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 14:25:04,417 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 14:25:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:04,417 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 14:25:04,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:25:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 14:25:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:25:04,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:04,418 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 14:25:04,419 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:04,419 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-10-04 14:25:04,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:04,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:04,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:04,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:04,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:05,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:05,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:05,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:25:05,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:25:05,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:05,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:05,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:05,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 14:25:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:25:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:25:05,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:05,267 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 14:25:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:05,728 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 14:25:05,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:25:05,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 14:25:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:05,729 INFO L225 Difference]: With dead ends: 52 [2018-10-04 14:25:05,729 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:25:05,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 46 [2018-10-04 14:25:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:25:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 14:25:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 14:25:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 14:25:05,731 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 14:25:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:05,731 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 14:25:05,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:25:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 14:25:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 14:25:05,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:05,732 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-04 14:25:05,732 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:05,732 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:05,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-10-04 14:25:05,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:05,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:05,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:05,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:05,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:07,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:07,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:07,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:25:07,486 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:25:07,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:07,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:07,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:07,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 14:25:07,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:25:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:25:07,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:07,621 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 14:25:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:07,718 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 14:25:07,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:25:07,719 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 14:25:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:07,719 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:25:07,720 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:25:07,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 47 [2018-10-04 14:25:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:25:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 14:25:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:25:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 14:25:07,722 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 14:25:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:07,722 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 14:25:07,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:25:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 14:25:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:25:07,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:07,723 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 14:25:07,723 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:07,723 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-10-04 14:25:07,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:07,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:07,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:07,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:07,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:08,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:08,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:08,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:25:08,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:25:08,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:08,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:08,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:08,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 14:25:08,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:25:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:25:08,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:08,834 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 14:25:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:08,932 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 14:25:08,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:25:08,932 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 14:25:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:08,933 INFO L225 Difference]: With dead ends: 54 [2018-10-04 14:25:08,934 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 14:25:08,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 48 [2018-10-04 14:25:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 14:25:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 14:25:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:25:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 14:25:08,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 14:25:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:08,937 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 14:25:08,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:25:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 14:25:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 14:25:08,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:08,938 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-04 14:25:08,938 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:08,938 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:08,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-10-04 14:25:08,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:08,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:08,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:08,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:08,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:09,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:09,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:09,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:25:09,778 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 14:25:09,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:09,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:09,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:09,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 14:25:09,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:25:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:25:09,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:09,901 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 14:25:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:09,973 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 14:25:09,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:25:09,973 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 14:25:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:09,974 INFO L225 Difference]: With dead ends: 55 [2018-10-04 14:25:09,974 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:25:09,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 49 [2018-10-04 14:25:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:25:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:25:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:25:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 14:25:09,976 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 14:25:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:09,976 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 14:25:09,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:25:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 14:25:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:25:09,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:09,977 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 14:25:09,977 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:09,977 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-10-04 14:25:09,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:09,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:09,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:09,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:09,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:10,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:10,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:10,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:10,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:11,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:11,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 14:25:11,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:25:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:25:11,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:11,004 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 14:25:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:11,113 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 14:25:11,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:25:11,114 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 14:25:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:11,114 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:25:11,114 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 14:25:11,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 50 [2018-10-04 14:25:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 14:25:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 14:25:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 14:25:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 14:25:11,117 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 14:25:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 14:25:11,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:25:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 14:25:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 14:25:11,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:11,118 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-04 14:25:11,120 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:11,120 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-10-04 14:25:11,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:11,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:11,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:11,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:11,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:11,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:11,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:11,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:25:11,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:25:11,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:11,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:12,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:12,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 14:25:12,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:25:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:25:12,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:12,088 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 14:25:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:12,181 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 14:25:12,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:25:12,182 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 14:25:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:12,183 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:25:12,183 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:25:12,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 51 [2018-10-04 14:25:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:25:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 14:25:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:25:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 14:25:12,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 14:25:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:12,185 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 14:25:12,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:25:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 14:25:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:25:12,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:12,186 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 14:25:12,186 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:12,186 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-10-04 14:25:12,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:12,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:12,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:12,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:12,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:13,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:13,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:13,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:25:13,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 14:25:13,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:13,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:14,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:14,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 14:25:14,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:25:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:25:14,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:14,069 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 14:25:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:14,161 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 14:25:14,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:25:14,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 14:25:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:14,163 INFO L225 Difference]: With dead ends: 58 [2018-10-04 14:25:14,163 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 14:25:14,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 52 [2018-10-04 14:25:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 14:25:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 14:25:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:25:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 14:25:14,166 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 14:25:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:14,167 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 14:25:14,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:25:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 14:25:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 14:25:14,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:14,167 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-04 14:25:14,168 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:14,168 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-10-04 14:25:14,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:14,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:14,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:14,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:14,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:15,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:15,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:15,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:25:15,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:25:15,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:15,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:15,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:15,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 14:25:15,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:25:15,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:25:15,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:15,353 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 14:25:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:15,446 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 14:25:15,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:25:15,447 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 14:25:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:15,448 INFO L225 Difference]: With dead ends: 59 [2018-10-04 14:25:15,448 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 14:25:15,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 53 [2018-10-04 14:25:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 14:25:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 14:25:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:25:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 14:25:15,451 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 14:25:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:15,451 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 14:25:15,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:25:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 14:25:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:25:15,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:15,452 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 14:25:15,452 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:15,452 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-10-04 14:25:15,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:15,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:15,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:15,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:15,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:17,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:17,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:17,113 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:25:17,156 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:25:17,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:17,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:17,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:17,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 14:25:17,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:25:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:25:17,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:17,317 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 14:25:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:17,416 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 14:25:17,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:25:17,416 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 14:25:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:17,417 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:25:17,417 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 14:25:17,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 54 [2018-10-04 14:25:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 14:25:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 14:25:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 14:25:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 14:25:17,419 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 14:25:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:17,420 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 14:25:17,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:25:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 14:25:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 14:25:17,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:17,421 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-04 14:25:17,421 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:17,421 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-10-04 14:25:17,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:17,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:17,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:17,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:17,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:18,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:18,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:18,551 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:25:18,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 14:25:18,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:18,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:18,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:18,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 14:25:18,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 14:25:18,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 14:25:18,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:18,839 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 14:25:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:18,926 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 14:25:18,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:25:18,927 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 14:25:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:18,928 INFO L225 Difference]: With dead ends: 61 [2018-10-04 14:25:18,928 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:25:18,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 55 [2018-10-04 14:25:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:25:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 14:25:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:25:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 14:25:18,931 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 14:25:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:18,931 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 14:25:18,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 14:25:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 14:25:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:25:18,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:18,931 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 14:25:18,932 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:18,932 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-10-04 14:25:18,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:18,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:18,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:18,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:18,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:20,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:20,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:20,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:20,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:20,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:20,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 14:25:20,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:25:20,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:25:20,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:20,218 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 14:25:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:20,344 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 14:25:20,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:25:20,345 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 14:25:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:20,346 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:25:20,346 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 14:25:20,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 56 [2018-10-04 14:25:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 14:25:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 14:25:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 14:25:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 14:25:20,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 14:25:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:20,349 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 14:25:20,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:25:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 14:25:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 14:25:20,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:20,350 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-04 14:25:20,350 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:20,350 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-10-04 14:25:20,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:20,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:20,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:20,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:20,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:21,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:21,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:21,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:25:21,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:25:21,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:21,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:21,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:21,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 14:25:21,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:25:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:25:21,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:21,956 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 14:25:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:22,059 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 14:25:22,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:25:22,060 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 14:25:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:22,060 INFO L225 Difference]: With dead ends: 63 [2018-10-04 14:25:22,061 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:25:22,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.2s impTime 57 [2018-10-04 14:25:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:25:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:25:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:25:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 14:25:22,063 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 14:25:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:22,064 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 14:25:22,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:25:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 14:25:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:25:22,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:22,065 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 14:25:22,065 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:22,065 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-10-04 14:25:22,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:22,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:22,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:22,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:22,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:23,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:23,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:23,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:25:23,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 14:25:23,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:23,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:23,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:23,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 14:25:23,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:25:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:25:23,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:23,971 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 14:25:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:24,078 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 14:25:24,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 14:25:24,079 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 14:25:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:24,080 INFO L225 Difference]: With dead ends: 64 [2018-10-04 14:25:24,080 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 14:25:24,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 58 [2018-10-04 14:25:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 14:25:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 14:25:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 14:25:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 14:25:24,082 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 14:25:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:24,082 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 14:25:24,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 14:25:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 14:25:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 14:25:24,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:24,083 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-04 14:25:24,084 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:24,084 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-10-04 14:25:24,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:24,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:24,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:25,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:25,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:25,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:25:25,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:25:25,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:25,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:25,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:25,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 14:25:25,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 14:25:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 14:25:25,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:25,779 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 14:25:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:25,881 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 14:25:25,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:25:25,881 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 14:25:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:25,882 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:25:25,882 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:25:25,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 59 [2018-10-04 14:25:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:25:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 14:25:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:25:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 14:25:25,885 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 14:25:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:25,885 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 14:25:25,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 14:25:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 14:25:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:25:25,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:25,886 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 14:25:25,886 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:25,886 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-10-04 14:25:25,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:25,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:25,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:25,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:25,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:28,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:28,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:28,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:25:28,076 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 14:25:28,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:28,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:28,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:28,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 14:25:28,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:25:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:25:28,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:28,294 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 14:25:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:28,417 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 14:25:28,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:25:28,417 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 14:25:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:28,418 INFO L225 Difference]: With dead ends: 66 [2018-10-04 14:25:28,418 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 14:25:28,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 60 [2018-10-04 14:25:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 14:25:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 14:25:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 14:25:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 14:25:28,421 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 14:25:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:28,421 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 14:25:28,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:25:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 14:25:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 14:25:28,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:28,422 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-04 14:25:28,422 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:28,422 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-10-04 14:25:28,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:28,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:28,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:28,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:28,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:29,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:29,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:29,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:25:29,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 14:25:29,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:29,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:29,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:29,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 14:25:29,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 14:25:29,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 14:25:29,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:29,787 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 14:25:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:29,880 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 14:25:29,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:25:29,881 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 14:25:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:29,882 INFO L225 Difference]: With dead ends: 67 [2018-10-04 14:25:29,882 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:25:29,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 61 [2018-10-04 14:25:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:25:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 14:25:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:25:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 14:25:29,885 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 14:25:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:29,885 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 14:25:29,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 14:25:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 14:25:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:25:29,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:29,886 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 14:25:29,886 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:29,886 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-10-04 14:25:29,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:29,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:29,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:29,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:29,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:30,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:30,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:30,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:30,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:31,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:31,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 14:25:31,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 14:25:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 14:25:31,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:31,091 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 14:25:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:31,206 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 14:25:31,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 14:25:31,206 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 14:25:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:31,207 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:25:31,207 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 14:25:31,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 62 [2018-10-04 14:25:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 14:25:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 14:25:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 14:25:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 14:25:31,209 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 14:25:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:31,210 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 14:25:31,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 14:25:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 14:25:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 14:25:31,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:31,211 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-04 14:25:31,211 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:31,211 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-10-04 14:25:31,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:31,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:31,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:31,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:31,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:32,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:32,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:32,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:25:32,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:25:32,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:32,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:32,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:32,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 14:25:32,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:25:32,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:25:32,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:32,620 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 14:25:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:32,808 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 14:25:32,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:25:32,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 14:25:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:32,810 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:25:32,810 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:25:32,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 63 [2018-10-04 14:25:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:25:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 14:25:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:25:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 14:25:32,814 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 14:25:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:32,814 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 14:25:32,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:25:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 14:25:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:25:32,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:32,815 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 14:25:32,815 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:32,815 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:32,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-10-04 14:25:32,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:32,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:32,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:32,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:32,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:34,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:34,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:34,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:25:34,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 14:25:34,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:34,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:34,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:34,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 14:25:34,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:25:34,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:25:34,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:34,451 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 14:25:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:34,673 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 14:25:34,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 14:25:34,674 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 14:25:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:34,675 INFO L225 Difference]: With dead ends: 70 [2018-10-04 14:25:34,675 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 14:25:34,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 64 [2018-10-04 14:25:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 14:25:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 14:25:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 14:25:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 14:25:34,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 14:25:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:34,677 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 14:25:34,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:25:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 14:25:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 14:25:34,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:34,678 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-04 14:25:34,678 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:34,679 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-10-04 14:25:34,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:34,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:34,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:34,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:34,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:36,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:36,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:36,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:25:36,951 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:25:36,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:36,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:37,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:37,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 14:25:37,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 14:25:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 14:25:37,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:37,103 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 14:25:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:37,252 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 14:25:37,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:25:37,253 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 14:25:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:37,254 INFO L225 Difference]: With dead ends: 71 [2018-10-04 14:25:37,254 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:25:37,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime 65 [2018-10-04 14:25:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:25:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 14:25:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 14:25:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 14:25:37,257 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 14:25:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:37,257 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 14:25:37,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 14:25:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 14:25:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:25:37,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:37,258 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 14:25:37,258 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:37,259 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-10-04 14:25:37,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:37,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:37,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:37,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:37,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:38,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:38,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:38,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:25:38,859 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 14:25:38,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:38,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:39,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:39,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 14:25:39,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 14:25:39,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 14:25:39,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:39,008 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-04 14:25:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:39,134 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 14:25:39,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 14:25:39,134 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-04 14:25:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:39,135 INFO L225 Difference]: With dead ends: 72 [2018-10-04 14:25:39,135 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 14:25:39,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 66 [2018-10-04 14:25:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 14:25:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 14:25:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 14:25:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 14:25:39,138 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 14:25:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:39,139 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 14:25:39,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 14:25:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 14:25:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 14:25:39,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:39,139 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-04 14:25:39,139 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:39,139 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:39,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-10-04 14:25:39,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:39,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:39,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:39,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:39,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:40,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:40,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:40,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:25:40,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 14:25:40,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:40,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:40,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:40,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 14:25:40,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 14:25:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 14:25:40,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:40,723 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-04 14:25:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:40,811 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 14:25:40,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 14:25:40,812 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-04 14:25:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:40,813 INFO L225 Difference]: With dead ends: 73 [2018-10-04 14:25:40,813 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 14:25:40,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.2s impTime 67 [2018-10-04 14:25:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 14:25:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 14:25:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 14:25:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 14:25:40,815 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 14:25:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:40,815 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 14:25:40,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 14:25:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 14:25:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 14:25:40,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:40,817 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 14:25:40,817 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:40,817 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-10-04 14:25:40,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:40,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:40,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:40,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:40,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:43,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:43,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:43,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:43,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:43,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:43,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 14:25:43,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 14:25:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 14:25:43,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:43,347 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-04 14:25:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:43,490 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 14:25:43,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 14:25:43,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 14:25:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:43,491 INFO L225 Difference]: With dead ends: 74 [2018-10-04 14:25:43,492 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 14:25:43,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 68 [2018-10-04 14:25:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 14:25:43,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 14:25:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 14:25:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 14:25:43,494 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 14:25:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:43,494 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 14:25:43,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 14:25:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 14:25:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 14:25:43,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:43,495 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-04 14:25:43,495 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:43,495 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-10-04 14:25:43,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:43,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:43,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:43,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:25:43,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:45,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:45,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:45,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:25:45,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:25:45,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:45,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:45,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:45,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 14:25:45,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 14:25:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 14:25:45,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:45,726 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-04 14:25:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:45,915 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 14:25:45,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:25:45,915 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-04 14:25:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:45,916 INFO L225 Difference]: With dead ends: 75 [2018-10-04 14:25:45,916 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 14:25:45,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.8s impTime 69 [2018-10-04 14:25:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 14:25:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 14:25:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:25:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 14:25:45,918 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 14:25:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:45,918 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 14:25:45,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 14:25:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 14:25:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:25:45,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:45,919 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 14:25:45,919 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:45,919 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-10-04 14:25:45,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:45,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:45,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:45,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:45,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:48,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:48,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:48,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:25:48,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 14:25:48,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:48,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:48,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:48,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 14:25:48,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 14:25:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 14:25:48,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:48,943 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-04 14:25:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:49,130 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 14:25:49,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 14:25:49,131 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-04 14:25:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:49,132 INFO L225 Difference]: With dead ends: 76 [2018-10-04 14:25:49,132 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 14:25:49,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 70 [2018-10-04 14:25:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 14:25:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 14:25:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 14:25:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 14:25:49,135 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 14:25:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:49,135 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 14:25:49,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 14:25:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 14:25:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 14:25:49,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:49,137 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-04 14:25:49,137 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:49,137 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-10-04 14:25:49,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:49,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:49,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:49,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:49,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:50,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:50,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:50,364 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:25:50,416 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:25:50,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:50,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:50,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:50,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 14:25:50,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 14:25:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 14:25:50,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:50,604 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-04 14:25:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:50,753 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 14:25:50,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 14:25:50,754 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-04 14:25:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:50,754 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:25:50,755 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 14:25:50,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 71 [2018-10-04 14:25:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 14:25:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 14:25:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 14:25:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 14:25:50,758 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 14:25:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:50,759 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 14:25:50,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 14:25:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 14:25:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:25:50,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:50,759 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 14:25:50,760 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:50,760 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-10-04 14:25:50,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:50,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:50,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:50,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:50,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:53,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:53,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:53,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:25:53,922 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 14:25:53,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:53,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:54,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:54,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 14:25:54,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:25:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:25:54,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:54,417 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-04 14:25:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:54,591 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 14:25:54,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 14:25:54,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 14:25:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:54,592 INFO L225 Difference]: With dead ends: 78 [2018-10-04 14:25:54,592 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 14:25:54,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.3s impTime 72 [2018-10-04 14:25:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 14:25:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 14:25:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 14:25:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 14:25:54,597 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 14:25:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:54,597 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 14:25:54,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:25:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 14:25:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 14:25:54,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:54,598 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-04 14:25:54,599 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:54,599 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-10-04 14:25:54,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:54,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:54,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:54,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:54,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:25:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:57,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:25:57,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:25:57,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:25:57,262 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 14:25:57,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:25:57,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:25:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:25:57,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:25:57,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 14:25:57,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 14:25:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 14:25:57,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:25:57,434 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-04 14:25:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:25:57,590 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 14:25:57,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 14:25:57,591 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-04 14:25:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:25:57,591 INFO L225 Difference]: With dead ends: 79 [2018-10-04 14:25:57,591 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:25:57,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime 73 [2018-10-04 14:25:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:25:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 14:25:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 14:25:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 14:25:57,594 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 14:25:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:25:57,594 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 14:25:57,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 14:25:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 14:25:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 14:25:57,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:25:57,595 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 14:25:57,595 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:25:57,595 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:25:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-10-04 14:25:57,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:25:57,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:25:57,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:57,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:25:57,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:25:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:00,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:00,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:00,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:26:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:00,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:01,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:01,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 14:26:01,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 14:26:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 14:26:01,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:01,066 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-04 14:26:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:01,231 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 14:26:01,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 14:26:01,232 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-04 14:26:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:01,232 INFO L225 Difference]: With dead ends: 80 [2018-10-04 14:26:01,232 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 14:26:01,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime 74 [2018-10-04 14:26:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 14:26:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 14:26:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 14:26:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 14:26:01,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 14:26:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:01,236 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 14:26:01,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 14:26:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 14:26:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 14:26:01,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:01,237 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-04 14:26:01,237 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:01,238 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-10-04 14:26:01,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:01,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:01,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:01,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:26:01,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:03,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:03,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:03,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:26:04,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:26:04,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:04,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:04,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:04,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 14:26:04,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:26:04,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:26:04,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:04,256 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-04 14:26:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:04,422 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 14:26:04,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:26:04,422 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-04 14:26:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:04,423 INFO L225 Difference]: With dead ends: 81 [2018-10-04 14:26:04,423 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 14:26:04,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.5s impTime 75 [2018-10-04 14:26:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 14:26:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 14:26:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 14:26:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 14:26:04,426 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 14:26:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:04,426 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 14:26:04,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:26:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 14:26:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 14:26:04,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:04,427 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 14:26:04,427 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:04,427 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-10-04 14:26:04,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:04,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:04,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:04,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:04,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:07,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:07,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:07,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:26:07,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 14:26:07,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:07,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:07,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:07,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 14:26:07,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 14:26:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 14:26:07,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:07,475 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-04 14:26:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:08,402 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 14:26:08,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 14:26:08,403 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 14:26:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:08,404 INFO L225 Difference]: With dead ends: 82 [2018-10-04 14:26:08,404 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 14:26:08,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.5s impTime 76 [2018-10-04 14:26:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 14:26:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 14:26:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 14:26:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 14:26:08,406 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 14:26:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:08,407 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 14:26:08,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 14:26:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 14:26:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 14:26:08,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:08,408 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-04 14:26:08,408 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:08,408 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-10-04 14:26:08,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:08,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:08,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:08,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:08,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:13,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:13,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:13,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:26:13,891 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:26:13,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:13,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:14,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:14,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 14:26:14,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 14:26:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 14:26:14,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:14,121 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-04 14:26:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:14,480 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 14:26:14,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 14:26:14,481 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-04 14:26:14,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:14,482 INFO L225 Difference]: With dead ends: 83 [2018-10-04 14:26:14,482 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 14:26:14,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 4.7s impTime 77 [2018-10-04 14:26:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 14:26:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 14:26:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 14:26:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 14:26:14,484 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 14:26:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:14,484 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 14:26:14,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 14:26:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 14:26:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:26:14,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:14,485 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-04 14:26:14,485 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:14,485 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-10-04 14:26:14,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:14,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:14,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:14,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:14,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:16,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:16,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:16,869 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:26:16,934 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 14:26:16,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:16,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:17,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:17,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 14:26:17,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 14:26:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 14:26:17,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:17,127 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-04 14:26:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:17,334 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 14:26:17,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 14:26:17,334 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-04 14:26:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:17,335 INFO L225 Difference]: With dead ends: 84 [2018-10-04 14:26:17,335 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 14:26:17,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 78 [2018-10-04 14:26:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 14:26:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 14:26:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 14:26:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 14:26:17,337 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 14:26:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:17,337 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 14:26:17,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 14:26:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 14:26:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 14:26:17,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:17,338 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-04 14:26:17,338 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:17,338 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-10-04 14:26:17,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:17,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:17,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:17,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:17,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:20,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:20,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:20,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:26:20,268 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 14:26:20,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:20,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:20,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:20,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 14:26:20,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 14:26:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 14:26:20,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:20,444 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-04 14:26:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:20,565 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 14:26:20,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 14:26:20,565 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-04 14:26:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:20,566 INFO L225 Difference]: With dead ends: 85 [2018-10-04 14:26:20,566 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:26:20,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 79 [2018-10-04 14:26:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:26:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 14:26:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 14:26:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 14:26:20,569 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 14:26:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:20,570 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 14:26:20,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 14:26:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 14:26:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 14:26:20,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:20,571 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-04 14:26:20,571 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:20,571 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-10-04 14:26:20,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:20,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:20,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:20,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:20,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:23,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:23,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:23,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:26:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:23,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:23,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:23,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 14:26:23,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 14:26:23,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 14:26:23,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:23,562 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-04 14:26:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:23,744 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 14:26:23,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 14:26:23,744 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 14:26:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:23,745 INFO L225 Difference]: With dead ends: 86 [2018-10-04 14:26:23,745 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 14:26:23,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 80 [2018-10-04 14:26:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 14:26:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 14:26:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 14:26:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 14:26:23,749 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 14:26:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:23,749 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 14:26:23,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 14:26:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 14:26:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 14:26:23,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:23,750 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-04 14:26:23,750 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:23,750 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-10-04 14:26:23,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:23,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:23,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:26:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:26,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:26,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:26,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:26:26,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:26:26,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:26,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:27,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:27,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 14:26:27,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 14:26:27,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 14:26:27,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:27,723 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-04 14:26:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:27,991 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 14:26:27,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 14:26:27,992 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-04 14:26:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:27,993 INFO L225 Difference]: With dead ends: 87 [2018-10-04 14:26:27,993 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 14:26:27,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 2.3s impTime 81 [2018-10-04 14:26:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 14:26:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 14:26:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 14:26:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 14:26:27,995 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 14:26:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:27,995 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 14:26:27,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 14:26:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 14:26:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 14:26:27,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:27,996 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-04 14:26:27,996 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:27,996 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-10-04 14:26:27,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:27,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:27,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:27,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:27,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:30,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:30,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:30,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:26:30,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 14:26:30,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:30,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:30,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:30,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 14:26:30,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 14:26:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 14:26:30,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:30,424 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-04 14:26:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:30,579 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 14:26:30,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 14:26:30,579 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-04 14:26:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:30,580 INFO L225 Difference]: With dead ends: 88 [2018-10-04 14:26:30,580 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 14:26:30,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 82 [2018-10-04 14:26:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 14:26:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 14:26:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 14:26:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 14:26:30,582 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 14:26:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:30,582 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 14:26:30,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 14:26:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 14:26:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 14:26:30,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:30,583 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-04 14:26:30,583 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:30,583 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-10-04 14:26:30,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:30,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:30,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:30,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:30,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:33,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:33,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:33,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:26:33,674 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:26:33,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:33,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:35,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:35,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 14:26:35,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 14:26:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 14:26:35,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:35,403 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-04 14:26:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:35,817 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 14:26:35,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 14:26:35,818 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-04 14:26:35,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:35,819 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:26:35,819 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 14:26:35,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 2.7s impTime 83 [2018-10-04 14:26:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 14:26:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 14:26:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 14:26:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 14:26:35,821 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 14:26:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:35,821 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 14:26:35,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 14:26:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 14:26:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:26:35,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:35,822 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-04 14:26:35,822 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:35,822 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-10-04 14:26:35,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:35,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:35,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:35,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:35,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:39,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:39,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:39,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:26:39,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 14:26:39,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:39,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:39,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:39,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 14:26:39,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 14:26:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 14:26:39,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:39,386 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-04 14:26:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:39,590 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 14:26:39,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 14:26:39,590 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 14:26:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:39,591 INFO L225 Difference]: With dead ends: 90 [2018-10-04 14:26:39,591 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 14:26:39,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 3.1s impTime 84 [2018-10-04 14:26:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 14:26:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 14:26:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 14:26:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 14:26:39,595 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 14:26:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:39,595 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 14:26:39,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 14:26:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 14:26:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 14:26:39,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:39,596 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-04 14:26:39,596 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:39,597 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-10-04 14:26:39,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:39,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:39,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:39,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:39,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:41,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:41,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:41,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:26:41,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 14:26:41,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:41,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:41,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:41,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 14:26:41,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 14:26:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 14:26:41,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:41,620 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-04 14:26:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:41,774 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 14:26:41,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 14:26:41,775 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-04 14:26:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:41,775 INFO L225 Difference]: With dead ends: 91 [2018-10-04 14:26:41,775 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 14:26:41,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.5s impTime 85 [2018-10-04 14:26:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 14:26:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 14:26:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 14:26:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 14:26:41,778 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 14:26:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:41,778 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 14:26:41,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 14:26:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 14:26:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 14:26:41,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:41,780 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-04 14:26:41,780 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:41,780 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-10-04 14:26:41,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:41,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:41,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:41,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:41,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:44,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:44,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:44,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:26:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:44,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:44,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:44,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 14:26:44,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 14:26:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 14:26:44,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:44,461 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-04 14:26:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:44,595 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 14:26:44,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 14:26:44,596 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-04 14:26:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:44,597 INFO L225 Difference]: With dead ends: 92 [2018-10-04 14:26:44,597 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 14:26:44,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 86 [2018-10-04 14:26:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 14:26:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 14:26:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 14:26:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 14:26:44,599 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 14:26:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:44,599 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 14:26:44,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 14:26:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 14:26:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 14:26:44,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:44,600 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-04 14:26:44,600 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:44,601 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-10-04 14:26:44,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:44,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:44,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:44,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:26:44,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:46,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:46,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:46,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:26:47,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:26:47,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:47,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:47,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:47,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 14:26:47,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 14:26:47,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 14:26:47,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:47,189 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-04 14:26:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:47,354 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 14:26:47,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 14:26:47,354 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-04 14:26:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:47,355 INFO L225 Difference]: With dead ends: 93 [2018-10-04 14:26:47,355 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 14:26:47,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 87 [2018-10-04 14:26:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 14:26:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 14:26:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:26:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 14:26:47,358 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 14:26:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:47,358 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 14:26:47,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 14:26:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 14:26:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:26:47,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:47,359 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-04 14:26:47,359 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:47,359 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-10-04 14:26:47,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:47,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:47,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:50,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:50,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:50,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:26:50,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 14:26:50,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:50,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:50,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:50,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 14:26:50,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 14:26:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 14:26:50,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:50,641 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-04 14:26:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:50,809 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 14:26:50,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 14:26:50,809 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 14:26:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:50,810 INFO L225 Difference]: With dead ends: 94 [2018-10-04 14:26:50,810 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 14:26:50,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.7s impTime 88 [2018-10-04 14:26:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 14:26:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 14:26:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 14:26:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 14:26:50,812 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 14:26:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:50,812 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 14:26:50,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 14:26:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 14:26:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 14:26:50,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:50,813 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-04 14:26:50,813 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:50,813 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-10-04 14:26:50,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:50,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:50,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:50,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:50,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:53,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:53,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:53,633 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:26:53,683 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:26:53,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:53,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:53,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:53,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 14:26:53,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 14:26:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 14:26:53,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:53,873 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-04 14:26:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:54,041 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 14:26:54,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 14:26:54,042 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-04 14:26:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:54,042 INFO L225 Difference]: With dead ends: 95 [2018-10-04 14:26:54,043 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 14:26:54,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 89 [2018-10-04 14:26:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 14:26:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 14:26:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 14:26:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 14:26:54,045 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 14:26:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:54,045 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 14:26:54,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 14:26:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 14:26:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:26:54,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:54,045 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-04 14:26:54,046 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:54,046 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:54,046 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-10-04 14:26:54,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:54,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:54,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:54,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:54,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:56,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:56,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:56,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:26:56,329 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 14:26:56,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:56,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:56,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:56,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 14:26:56,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 14:26:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 14:26:56,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:56,526 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-04 14:26:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:56,687 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 14:26:56,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 14:26:56,688 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-04 14:26:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:56,688 INFO L225 Difference]: With dead ends: 96 [2018-10-04 14:26:56,689 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 14:26:56,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime 90 [2018-10-04 14:26:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 14:26:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 14:26:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 14:26:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 14:26:56,691 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 14:26:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:56,691 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 14:26:56,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 14:26:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 14:26:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 14:26:56,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:56,691 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-04 14:26:56,692 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:56,692 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-10-04 14:26:56,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:56,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:56,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:56,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:56,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:26:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:59,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:26:59,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:26:59,015 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:26:59,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 14:26:59,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:26:59,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:26:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:26:59,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:26:59,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 14:26:59,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 14:26:59,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 14:26:59,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:26:59,280 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-04 14:26:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:26:59,446 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 14:26:59,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 14:26:59,446 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-04 14:26:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:26:59,447 INFO L225 Difference]: With dead ends: 97 [2018-10-04 14:26:59,447 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 14:26:59,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 91 [2018-10-04 14:26:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 14:26:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 14:26:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 14:26:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 14:26:59,450 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 14:26:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:26:59,450 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 14:26:59,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 14:26:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 14:26:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 14:26:59,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:26:59,451 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-04 14:26:59,451 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:26:59,451 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:26:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-10-04 14:26:59,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:26:59,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:26:59,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:59,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:26:59,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:26:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:03,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:03,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:03,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:03,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:03,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:03,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 14:27:03,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 14:27:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 14:27:03,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:03,829 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-04 14:27:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:04,081 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 14:27:04,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 14:27:04,081 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 14:27:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:04,082 INFO L225 Difference]: With dead ends: 98 [2018-10-04 14:27:04,082 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 14:27:04,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.7s impTime 92 [2018-10-04 14:27:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 14:27:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 14:27:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 14:27:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 14:27:04,084 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 14:27:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:04,085 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 14:27:04,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 14:27:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 14:27:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 14:27:04,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:04,085 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-04 14:27:04,085 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:04,085 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-10-04 14:27:04,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:04,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:04,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:04,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:04,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:06,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:06,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:06,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:27:06,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:27:06,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:06,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:07,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:07,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 14:27:07,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 14:27:07,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 14:27:07,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:07,182 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-04 14:27:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:07,368 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 14:27:07,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 14:27:07,369 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-04 14:27:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:07,369 INFO L225 Difference]: With dead ends: 99 [2018-10-04 14:27:07,370 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 14:27:07,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 93 [2018-10-04 14:27:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 14:27:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 14:27:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 14:27:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 14:27:07,372 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 14:27:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:07,372 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 14:27:07,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 14:27:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 14:27:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 14:27:07,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:07,372 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-04 14:27:07,373 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:07,373 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:07,373 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-10-04 14:27:07,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:07,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:07,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:07,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:07,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:10,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:10,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:10,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:27:10,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 14:27:10,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:10,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:11,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:11,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 14:27:11,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 14:27:11,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 14:27:11,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:11,103 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-04 14:27:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:11,300 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 14:27:11,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 14:27:11,301 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-04 14:27:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:11,301 INFO L225 Difference]: With dead ends: 100 [2018-10-04 14:27:11,302 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 14:27:11,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.8s impTime 94 [2018-10-04 14:27:11,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 14:27:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 14:27:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 14:27:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 14:27:11,304 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 14:27:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:11,304 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 14:27:11,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 14:27:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 14:27:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 14:27:11,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:11,305 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-04 14:27:11,305 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:11,305 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-10-04 14:27:11,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:11,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:11,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:11,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:11,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:14,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:14,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:14,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:27:14,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:27:14,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:14,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:15,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:15,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 14:27:15,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 14:27:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 14:27:15,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:15,268 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-04 14:27:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:15,460 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 14:27:15,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 14:27:15,460 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-04 14:27:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:15,460 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:27:15,460 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 14:27:15,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.4s impTime 95 [2018-10-04 14:27:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 14:27:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 14:27:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 14:27:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 14:27:15,464 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 14:27:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:15,464 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 14:27:15,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 14:27:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 14:27:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:27:15,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:15,465 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-04 14:27:15,465 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:15,465 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-10-04 14:27:15,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:15,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:15,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:15,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:15,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:18,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:18,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:18,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:27:18,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 14:27:18,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:18,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:18,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:18,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 14:27:18,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 14:27:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 14:27:18,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:18,775 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-04 14:27:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:19,090 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 14:27:19,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 14:27:19,091 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 14:27:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:19,091 INFO L225 Difference]: With dead ends: 102 [2018-10-04 14:27:19,091 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 14:27:19,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.7s impTime 96 [2018-10-04 14:27:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 14:27:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 14:27:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 14:27:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 14:27:19,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 14:27:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:19,094 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 14:27:19,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 14:27:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 14:27:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 14:27:19,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:19,095 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-04 14:27:19,095 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:19,095 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-10-04 14:27:19,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:19,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:19,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:19,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:19,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:21,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:21,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:21,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:27:21,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 14:27:21,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:21,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:21,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:21,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 14:27:21,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 14:27:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 14:27:21,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:21,840 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-04 14:27:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:22,025 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 14:27:22,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 14:27:22,026 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-04 14:27:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:22,026 INFO L225 Difference]: With dead ends: 103 [2018-10-04 14:27:22,026 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:27:22,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.2s impTime 97 [2018-10-04 14:27:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:27:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 14:27:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:27:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 14:27:22,030 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 14:27:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:22,030 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 14:27:22,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 14:27:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 14:27:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:27:22,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:22,031 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-04 14:27:22,031 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:22,031 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-10-04 14:27:22,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:22,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:22,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:22,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:22,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:25,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:25,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:25,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:25,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:26,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:26,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 14:27:26,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 14:27:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 14:27:26,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:26,059 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-04 14:27:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:26,289 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 14:27:26,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 14:27:26,289 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-04 14:27:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:26,290 INFO L225 Difference]: With dead ends: 104 [2018-10-04 14:27:26,290 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 14:27:26,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime 98 [2018-10-04 14:27:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 14:27:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 14:27:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 14:27:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 14:27:26,293 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 14:27:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:26,293 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 14:27:26,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 14:27:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 14:27:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 14:27:26,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:26,294 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-04 14:27:26,294 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:26,294 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-10-04 14:27:26,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:26,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:26,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:26,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:26,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:30,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:30,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:30,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:27:31,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:27:31,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:31,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:31,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:31,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 14:27:31,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 14:27:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 14:27:31,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:31,204 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-04 14:27:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:31,484 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 14:27:31,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 14:27:31,484 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-04 14:27:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:31,485 INFO L225 Difference]: With dead ends: 105 [2018-10-04 14:27:31,485 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 14:27:31,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.4s impTime 99 [2018-10-04 14:27:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 14:27:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 14:27:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 14:27:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 14:27:31,487 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 14:27:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:31,488 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 14:27:31,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 14:27:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 14:27:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 14:27:31,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:31,488 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-04 14:27:31,488 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:31,489 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-10-04 14:27:31,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:31,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:31,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:31,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:31,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:36,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:36,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:36,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:27:36,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 14:27:36,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:36,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:36,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:36,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 14:27:36,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 14:27:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 14:27:36,519 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:36,519 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-04 14:27:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:36,827 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-04 14:27:36,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 14:27:36,828 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 14:27:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:36,829 INFO L225 Difference]: With dead ends: 106 [2018-10-04 14:27:36,829 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 14:27:36,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.4s impTime 100 [2018-10-04 14:27:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 14:27:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 14:27:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 14:27:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 14:27:36,832 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 14:27:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:36,832 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 14:27:36,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 14:27:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 14:27:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 14:27:36,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:36,834 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-04 14:27:36,834 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:36,834 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-10-04 14:27:36,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:36,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:36,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:36,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:36,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:41,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:41,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:41,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:27:41,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:27:41,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:41,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:41,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:41,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 14:27:41,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 14:27:41,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 14:27:41,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:41,697 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-04 14:27:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:42,013 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 14:27:42,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 14:27:42,013 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-04 14:27:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:42,014 INFO L225 Difference]: With dead ends: 107 [2018-10-04 14:27:42,014 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 14:27:42,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.3s impTime 101 [2018-10-04 14:27:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 14:27:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 14:27:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 14:27:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 14:27:42,017 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-04 14:27:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:42,017 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 14:27:42,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 14:27:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 14:27:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:27:42,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:42,018 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-04 14:27:42,019 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:42,019 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-10-04 14:27:42,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:42,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:42,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:42,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:42,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:47,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:47,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:47,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:27:47,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 14:27:47,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:47,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:47,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:47,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 14:27:47,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 14:27:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 14:27:47,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:47,390 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-04 14:27:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:47,720 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-04 14:27:47,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 14:27:47,721 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-04 14:27:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:47,722 INFO L225 Difference]: With dead ends: 108 [2018-10-04 14:27:47,722 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 14:27:47,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.7s impTime 102 [2018-10-04 14:27:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 14:27:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 14:27:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 14:27:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 14:27:47,725 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-04 14:27:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:47,726 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 14:27:47,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 14:27:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 14:27:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 14:27:47,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:47,727 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-04 14:27:47,727 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:47,727 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:47,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-10-04 14:27:47,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:47,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:47,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:47,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:47,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:52,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:52,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:52,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:27:52,733 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 14:27:52,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:52,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:52,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:52,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 14:27:52,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 14:27:52,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 14:27:52,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:52,994 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-04 14:27:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:53,304 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 14:27:53,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 14:27:53,304 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-04 14:27:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:53,305 INFO L225 Difference]: With dead ends: 109 [2018-10-04 14:27:53,305 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 14:27:53,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.6s impTime 103 [2018-10-04 14:27:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 14:27:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 14:27:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 14:27:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 14:27:53,308 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-04 14:27:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:53,308 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 14:27:53,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 14:27:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 14:27:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 14:27:53,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:53,309 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-04 14:27:53,309 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:53,309 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-10-04 14:27:53,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:53,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:53,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:53,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:27:53,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:56,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:56,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:56,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:56,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:27:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:56,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:27:56,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 14:27:56,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 14:27:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 14:27:56,815 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:56,815 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-04 14:27:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:57,054 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-04 14:27:57,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 14:27:57,054 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 14:27:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:57,054 INFO L225 Difference]: With dead ends: 110 [2018-10-04 14:27:57,054 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 14:27:57,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.9s impTime 104 [2018-10-04 14:27:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 14:27:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 14:27:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 14:27:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 14:27:57,057 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-04 14:27:57,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:57,057 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 14:27:57,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 14:27:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 14:27:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 14:27:57,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:57,058 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-04 14:27:57,058 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:57,058 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-10-04 14:27:57,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:57,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:57,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:57,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:57,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:59,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:59,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:27:59,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:27:59,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:27:59,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:00,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:00,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 14:28:00,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 14:28:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 14:28:00,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:00,323 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-04 14:28:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:00,553 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 14:28:00,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 14:28:00,554 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-04 14:28:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:00,554 INFO L225 Difference]: With dead ends: 111 [2018-10-04 14:28:00,554 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 14:28:00,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 105 [2018-10-04 14:28:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 14:28:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 14:28:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 14:28:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 14:28:00,557 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-04 14:28:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:00,557 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 14:28:00,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 14:28:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 14:28:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 14:28:00,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:00,558 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-04 14:28:00,558 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:00,558 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-10-04 14:28:00,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:00,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:00,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:00,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:00,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:05,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:05,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:05,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:06,026 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 14:28:06,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:06,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:06,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:06,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 14:28:06,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 14:28:06,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 14:28:06,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:06,247 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-04 14:28:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:06,601 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-04 14:28:06,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 14:28:06,601 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-04 14:28:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:06,602 INFO L225 Difference]: With dead ends: 112 [2018-10-04 14:28:06,602 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 14:28:06,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 5.1s impTime 106 [2018-10-04 14:28:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 14:28:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 14:28:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 14:28:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 14:28:06,604 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-04 14:28:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:06,604 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 14:28:06,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 14:28:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 14:28:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 14:28:06,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:06,605 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-04 14:28:06,605 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:06,605 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-10-04 14:28:06,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:06,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:06,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:06,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:10,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:10,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:10,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:10,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:10,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:10,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:10,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:10,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 14:28:10,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 14:28:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 14:28:10,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:10,617 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-04 14:28:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:10,906 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 14:28:10,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 14:28:10,906 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-04 14:28:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:10,906 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:28:10,906 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 14:28:10,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.4s impTime 107 [2018-10-04 14:28:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 14:28:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 14:28:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 14:28:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 14:28:10,910 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-04 14:28:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:10,910 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 14:28:10,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 14:28:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 14:28:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:28:10,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:10,911 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-04 14:28:10,911 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:10,911 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-10-04 14:28:10,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:10,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:10,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:10,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:10,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:16,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:16,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:16,286 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:16,393 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 14:28:16,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:16,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:16,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:16,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 14:28:16,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 14:28:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 14:28:16,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:16,621 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-04 14:28:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:16,978 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-04 14:28:16,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 14:28:16,979 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-04 14:28:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:16,979 INFO L225 Difference]: With dead ends: 114 [2018-10-04 14:28:16,979 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 14:28:16,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 5.1s impTime 108 [2018-10-04 14:28:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 14:28:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 14:28:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 14:28:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 14:28:16,982 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-04 14:28:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:16,982 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 14:28:16,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 14:28:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 14:28:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 14:28:16,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:16,983 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-04 14:28:16,983 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:16,983 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-10-04 14:28:16,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:16,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:16,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:16,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:16,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:19,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:19,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:19,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:19,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 14:28:19,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:19,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:20,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:20,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-04 14:28:20,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-04 14:28:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-04 14:28:20,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:20,130 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-04 14:28:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:20,438 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 14:28:20,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-04 14:28:20,438 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-04 14:28:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:20,439 INFO L225 Difference]: With dead ends: 115 [2018-10-04 14:28:20,439 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:28:20,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 109 [2018-10-04 14:28:20,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:28:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 14:28:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 14:28:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 14:28:20,442 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-04 14:28:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:20,442 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 14:28:20,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-04 14:28:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 14:28:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 14:28:20,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:20,443 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-04 14:28:20,443 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:20,443 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-10-04 14:28:20,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:20,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:20,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:20,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:20,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 14:28:23,501 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:28:23,506 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:28:23,506 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:28:23 BoogieIcfgContainer [2018-10-04 14:28:23,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:28:23,507 INFO L168 Benchmark]: Toolchain (without parser) took 234639.42 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -64.0 MB). Free memory was 1.4 GB in the beginning and 958.3 MB in the end (delta: 486.4 MB). Peak memory consumption was 422.4 MB. Max. memory is 7.1 GB. [2018-10-04 14:28:23,509 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:28:23,509 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:28:23,509 INFO L168 Benchmark]: Boogie Preprocessor took 20.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:28:23,510 INFO L168 Benchmark]: RCFGBuilder took 280.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:28:23,511 INFO L168 Benchmark]: TraceAbstraction took 234291.81 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -64.0 MB). Free memory was 1.4 GB in the beginning and 958.3 MB in the end (delta: 465.3 MB). Peak memory consumption was 401.3 MB. Max. memory is 7.1 GB. [2018-10-04 14:28:23,514 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 280.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234291.81 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -64.0 MB). Free memory was 1.4 GB in the beginning and 958.3 MB in the end (delta: 465.3 MB). Peak memory consumption was 401.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 113 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 111 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 234.2s OverallTime, 110 OverallIterations, 109 TraceHistogramMax, 16.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 327 SDtfs, 0 SDslu, 4348 SDs, 0 SdLazy, 10452 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12206 GetRequests, 6211 SyntacticMatches, 0 SemanticMatches, 5995 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 109 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 203.3s InterpolantComputationTime, 12423 NumberOfCodeBlocks, 12423 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 12206 ConstructedInterpolants, 0 QuantifiedInterpolants, 2673980 SizeOfPredicates, 108 NumberOfNonLiveVariables, 25488 ConjunctsInSsa, 6102 ConjunctsInUnsatCore, 217 InterpolantComputations, 1 PerfectInterpolantSequences, 0/431640 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-28-23-523.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-28-23-523.csv Completed graceful shutdown