java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:35:44,658 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:35:44,660 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:35:44,675 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:35:44,676 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:35:44,678 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:35:44,679 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:35:44,681 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:35:44,683 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:35:44,684 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:35:44,685 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:35:44,685 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:35:44,686 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:35:44,687 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:35:44,688 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:35:44,689 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:35:44,689 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:35:44,691 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:35:44,693 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:35:44,695 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:35:44,696 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:35:44,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:35:44,700 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 08:35:44,719 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:35:44,745 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:35:44,745 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:35:44,746 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:35:44,746 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:35:44,747 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:35:44,747 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:35:44,747 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:35:44,747 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:35:44,748 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:35:44,748 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:35:44,748 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:35:44,748 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:35:44,748 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:35:44,749 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:35:44,749 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:35:44,749 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:35:44,749 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:35:44,749 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:35:44,750 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:35:44,750 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:35:44,750 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:35:44,750 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:35:44,750 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:35:44,750 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:35:44,751 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:35:44,751 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:35:44,751 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:35:44,751 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:35:44,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:35:44,752 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:35:44,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:35:44,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:35:44,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:35:44,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:35:44,818 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:35:44,819 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-10-03 08:35:44,819 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl' [2018-10-03 08:35:44,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:35:44,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:35:44,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:35:44,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:35:44,881 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:35:44,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:35:44,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:35:44,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:35:44,919 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:35:44,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... [2018-10-03 08:35:44,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:35:44,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:35:44,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:35:44,938 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:35:44,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:35:44,997 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 08:35:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:35:44,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:35:45,220 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:35:45,221 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:35:45 BoogieIcfgContainer [2018-10-03 08:35:45,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:35:45,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:35:45,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:35:45,225 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:35:45,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:35:44" (1/2) ... [2018-10-03 08:35:45,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7089ef2d and model type const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:35:45, skipping insertion in model container [2018-10-03 08:35:45,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:35:45" (2/2) ... [2018-10-03 08:35:45,229 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-10-03 08:35:45,240 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:35:45,249 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:35:45,307 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:35:45,307 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:35:45,308 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:35:45,308 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:35:45,308 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:35:45,308 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:35:45,308 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:35:45,309 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:35:45,309 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:35:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 08:35:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:35:45,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:45,348 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:35:45,352 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:45,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-03 08:35:45,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:45,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:45,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:45,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:45,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:45,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:35:45,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:35:45,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:35:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:35:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:35:45,568 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-03 08:35:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:45,616 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-03 08:35:45,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:35:45,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 08:35:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:45,629 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:35:45,629 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 08:35:45,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:35:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 08:35:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 08:35:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 08:35:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 08:35:45,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 08:35:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:45,671 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 08:35:45,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:35:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 08:35:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:35:45,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:45,672 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:35:45,672 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:45,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-03 08:35:45,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:45,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:45,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:45,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:45,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:45,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:45,829 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 [2018-10-03 08:35:45,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:45,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:46,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:35:46,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:35:46,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:35:46,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:35:46,035 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-03 08:35:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:46,098 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 08:35:46,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:35:46,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-03 08:35:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:46,101 INFO L225 Difference]: With dead ends: 8 [2018-10-03 08:35:46,102 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:35:46,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:35:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:35:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:35:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:35:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:35:46,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:35:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:46,106 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:35:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:35:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:35:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:35:46,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:46,107 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-03 08:35:46,108 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:46,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-03 08:35:46,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:46,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:46,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:46,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:46,254 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 [2018-10-03 08:35:46,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:46,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:46,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:46,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:46,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:35:46,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:35:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:35:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:35:46,310 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-03 08:35:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:46,367 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:35:46,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:35:46,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-03 08:35:46,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:46,368 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:35:46,368 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:35:46,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:35:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:35:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:35:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:35:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:35:46,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:35:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:46,372 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:35:46,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:35:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:35:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:35:46,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:46,373 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-03 08:35:46,373 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:46,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-03 08:35:46,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:46,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:46,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:46,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:46,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:35:46,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:46,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:35:46,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:46,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:46,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:35:46,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:35:46,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:35:46,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:35:46,541 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-03 08:35:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:46,610 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:35:46,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:35:46,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-03 08:35:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:46,612 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:35:46,612 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:35:46,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:35:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:35:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:35:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:35:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:35:46,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:35:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:46,616 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:35:46,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:35:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:35:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:35:46,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:46,617 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-03 08:35:46,617 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:46,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-03 08:35:46,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:46,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:46,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:46,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:46,899 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 [2018-10-03 08:35:46,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:46,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:46,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:46,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:46,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:46,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:35:46,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:35:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:35:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:35:46,951 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-03 08:35:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:47,039 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:35:47,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:35:47,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 08:35:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:47,041 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:35:47,042 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:35:47,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:35:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:35:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:35:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:35:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:35:47,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:35:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:47,045 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:35:47,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:35:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:35:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:35:47,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:47,046 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-03 08:35:47,046 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:47,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-03 08:35:47,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:47,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:47,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:47,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:47,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:47,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:47,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:35:47,244 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:47,265 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:35:47,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:47,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:47,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:47,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:35:47,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:35:47,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:35:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:35:47,299 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-03 08:35:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:47,425 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:35:47,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:35:47,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-03 08:35:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:47,427 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:35:47,427 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:35:47,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:35:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:35:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:35:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:35:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:35:47,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:35:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:47,432 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:35:47,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:35:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:35:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:35:47,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:47,433 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-03 08:35:47,433 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:47,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:47,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-03 08:35:47,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:47,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:47,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:47,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:47,547 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 [2018-10-03 08:35:47,556 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:47,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:35:47,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:47,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:47,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:47,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:35:47,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:35:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:35:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:35:47,611 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-03 08:35:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:47,651 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:35:47,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:35:47,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-03 08:35:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:47,653 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:35:47,653 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:35:47,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:35:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:35:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:35:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:35:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:35:47,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:35:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:47,657 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:35:47,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:35:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:35:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:35:47,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:47,658 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-03 08:35:47,658 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:47,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-03 08:35:47,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:47,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:47,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:47,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:47,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:48,004 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 [2018-10-03 08:35:48,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:48,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:48,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:35:48,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:35:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:35:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:35:48,114 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-03 08:35:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:48,196 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:35:48,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:35:48,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 08:35:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:48,197 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:35:48,197 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:35:48,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:35:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:35:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:35:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:35:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:35:48,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:35:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:48,202 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:35:48,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:35:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:35:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:35:48,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:48,202 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-03 08:35:48,203 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:48,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-03 08:35:48,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:48,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:48,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:48,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:48,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:48,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:35:48,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:48,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:48,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:48,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:48,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:35:48,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:35:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:35:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:35:48,406 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-03 08:35:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:48,458 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:35:48,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:35:48,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-03 08:35:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:48,460 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:35:48,460 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:35:48,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:35:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:35:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:35:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:35:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:35:48,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:35:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:48,464 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:35:48,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:35:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:35:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:35:48,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:48,465 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-03 08:35:48,466 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:48,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-03 08:35:48,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:48,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:48,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:48,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:48,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:48,605 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 [2018-10-03 08:35:48,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:48,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:35:48,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:48,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:48,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:35:48,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:35:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:35:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:35:48,671 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-03 08:35:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:48,733 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:35:48,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:35:48,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-03 08:35:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:48,734 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:35:48,734 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:35:48,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:35:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:35:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:35:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:35:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:35:48,739 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:35:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:48,740 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:35:48,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:35:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:35:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:35:48,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:48,741 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-03 08:35:48,741 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:48,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-03 08:35:48,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:48,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:48,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:48,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:48,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:49,120 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 [2018-10-03 08:35:49,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:49,152 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:49,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:49,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:49,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:35:49,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:35:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:35:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:35:49,185 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-03 08:35:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:49,244 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:35:49,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:35:49,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-03 08:35:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:49,245 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:35:49,245 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:35:49,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:35:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:35:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:35:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:35:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:35:49,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:35:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:49,250 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:35:49,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:35:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:35:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:35:49,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:49,251 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-03 08:35:49,251 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:49,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-03 08:35:49,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:49,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:49,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:49,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:49,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:49,521 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 [2018-10-03 08:35:49,529 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:49,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:35:49,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:49,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:49,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:35:49,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:35:49,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:35:49,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:35:49,595 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-03 08:35:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:49,655 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:35:49,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:35:49,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 08:35:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:49,656 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:35:49,657 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:35:49,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:35:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:35:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:35:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:35:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:35:49,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:35:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:49,661 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:35:49,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:35:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:35:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:35:49,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:49,662 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-03 08:35:49,662 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:49,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:49,662 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-03 08:35:49,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:49,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:49,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:49,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:49,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:49,864 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 [2018-10-03 08:35:49,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:49,905 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:35:49,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:49,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:49,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:35:49,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:35:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:35:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:35:49,953 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-03 08:35:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:49,998 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:35:50,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:35:50,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-03 08:35:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:50,002 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:35:50,002 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:35:50,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:35:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:35:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:35:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:35:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:35:50,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:35:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:50,006 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:35:50,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:35:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:35:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:35:50,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:50,007 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-03 08:35:50,007 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:50,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-03 08:35:50,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:50,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:50,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:50,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:50,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:50,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:50,227 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 [2018-10-03 08:35:50,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:50,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:50,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:50,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:35:50,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:35:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:35:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:35:50,289 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-03 08:35:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:50,592 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:35:50,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:35:50,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-03 08:35:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:50,594 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:35:50,594 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:35:50,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:35:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:35:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:35:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:35:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:35:50,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:35:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:50,598 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:35:50,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:35:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:35:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:35:50,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:50,599 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-03 08:35:50,599 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:50,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:50,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-03 08:35:50,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:50,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:50,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:50,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:50,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:50,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:50,844 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 [2018-10-03 08:35:50,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:50,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:50,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:50,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:50,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:50,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:35:50,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:35:50,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:35:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:35:50,941 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-03 08:35:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:51,164 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:35:51,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:35:51,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-03 08:35:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:51,165 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:35:51,165 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:35:51,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:35:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:35:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:35:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:35:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:35:51,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:35:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:51,170 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:35:51,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:35:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:35:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:35:51,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:51,171 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-03 08:35:51,171 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:51,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-03 08:35:51,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:51,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:51,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:51,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:51,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:51,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:51,425 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 [2018-10-03 08:35:51,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:51,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:35:51,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:51,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:51,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:51,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:35:51,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:35:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:35:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:35:51,491 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-03 08:35:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:51,536 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:35:51,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:35:51,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 08:35:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:51,537 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:35:51,537 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:35:51,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:35:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:35:51,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:35:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:35:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:35:51,541 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:35:51,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:51,541 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:35:51,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:35:51,541 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:35:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:35:51,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:51,542 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-03 08:35:51,542 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:51,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-03 08:35:51,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:51,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:51,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:51,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:51,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:52,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:52,113 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 [2018-10-03 08:35:52,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:52,151 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:52,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:52,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:52,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:52,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:35:52,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:35:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:35:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:35:52,187 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-03 08:35:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:52,234 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:35:52,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:35:52,235 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-03 08:35:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:52,236 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:35:52,236 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:35:52,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:35:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:35:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:35:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:35:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:35:52,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:35:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:52,241 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:35:52,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:35:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:35:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:35:52,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:52,242 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-03 08:35:52,242 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:52,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-03 08:35:52,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:52,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:52,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:52,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:52,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:52,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:52,530 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 [2018-10-03 08:35:52,537 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:52,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:35:52,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:52,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:52,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:52,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:35:52,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:35:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:35:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:35:52,649 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-03 08:35:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:52,721 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:35:52,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:35:52,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-03 08:35:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:52,724 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:35:52,724 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:35:52,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:35:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:35:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:35:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:35:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:35:52,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:35:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:52,728 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:35:52,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:35:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:35:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:35:52,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:52,729 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-03 08:35:52,729 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:52,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-03 08:35:52,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:52,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:52,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:52,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:52,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:53,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:53,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:35:53,025 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:53,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:35:53,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:53,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:53,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:53,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:35:53,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:35:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:35:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:35:53,133 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-03 08:35:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:53,248 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:35:53,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:35:53,249 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-03 08:35:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:53,250 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:35:53,250 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:35:53,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:35:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:35:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:35:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:35:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:35:53,255 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:35:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:53,255 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:35:53,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:35:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:35:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:35:53,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:53,256 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-03 08:35:53,256 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:53,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-03 08:35:53,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:53,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:53,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:53,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:53,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:53,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:53,530 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 [2018-10-03 08:35:53,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:53,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:53,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:53,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:35:53,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:35:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:35:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:35:53,602 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-03 08:35:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:53,657 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:35:53,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:35:53,657 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 08:35:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:53,658 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:35:53,658 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:35:53,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:35:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:35:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:35:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:35:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:35:53,662 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:35:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:53,662 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:35:53,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:35:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:35:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:35:53,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:53,663 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-03 08:35:53,663 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:53,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:53,664 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-03 08:35:53,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:53,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:53,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:53,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:53,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:54,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:54,029 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 [2018-10-03 08:35:54,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:54,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:54,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:54,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:54,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:54,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:35:54,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:35:54,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:35:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:35:54,115 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-03 08:35:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:54,201 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:35:54,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:35:54,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-03 08:35:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:54,204 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:35:54,204 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:35:54,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:35:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:35:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:35:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:35:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:35:54,208 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:35:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:54,208 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:35:54,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:35:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:35:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:35:54,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:54,209 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-03 08:35:54,209 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:54,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-03 08:35:54,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:54,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:54,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:54,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:54,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:54,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:54,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:35:54,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:54,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:35:54,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:54,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:54,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:54,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:35:54,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:35:54,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:35:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:35:54,822 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-03 08:35:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:54,868 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:35:54,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:35:54,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-03 08:35:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:54,869 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:35:54,869 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:35:54,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:35:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:35:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:35:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:35:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:35:54,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:35:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:54,874 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:35:54,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:35:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:35:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:35:54,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:54,874 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-03 08:35:54,875 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:54,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-03 08:35:54,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:54,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:54,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:54,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:54,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:55,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:55,301 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 [2018-10-03 08:35:55,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:55,364 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:55,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:55,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:55,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:55,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:35:55,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:35:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:35:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:35:55,401 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-03 08:35:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:55,482 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:35:55,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:35:55,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-03 08:35:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:55,483 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:35:55,483 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:35:55,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:35:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:35:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:35:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:35:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:35:55,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:35:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:55,489 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:35:55,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:35:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:35:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:35:55,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:55,490 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-03 08:35:55,491 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:55,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:55,491 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-03 08:35:55,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:55,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:55,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:55,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:55,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:55,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:55,949 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 [2018-10-03 08:35:55,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:56,002 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:35:56,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:56,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:56,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:56,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:35:56,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:35:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:35:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:35:56,044 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-03 08:35:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:56,090 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:35:56,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:35:56,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 08:35:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:56,091 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:35:56,091 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:35:56,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:35:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:35:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:35:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:35:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:35:56,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:35:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:56,097 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:35:56,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:35:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:35:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:35:56,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:56,098 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-03 08:35:56,098 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:56,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-03 08:35:56,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:56,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:56,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:56,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:56,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:56,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:56,716 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 [2018-10-03 08:35:56,723 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:56,754 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:35:56,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:56,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:56,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:56,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:35:56,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:35:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:35:56,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:35:56,797 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-03 08:35:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:56,863 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:35:56,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:35:56,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-03 08:35:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:56,864 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:35:56,864 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:35:56,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:35:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:35:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:35:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:35:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:35:56,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:35:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:56,869 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:35:56,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:35:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:35:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:35:56,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:56,870 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-03 08:35:56,871 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:56,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-03 08:35:56,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:56,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:56,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:56,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:56,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:58,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:58,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:35:58,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:58,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:58,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:58,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:35:58,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:35:58,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:35:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:35:58,119 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-03 08:35:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:58,180 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:35:58,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:35:58,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-03 08:35:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:58,181 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:35:58,181 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:35:58,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:35:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:35:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:35:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:35:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:35:58,186 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:35:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:58,186 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:35:58,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:35:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:35:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:35:58,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:58,188 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-03 08:35:58,188 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:58,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-03 08:35:58,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:58,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:58,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:58,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:58,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:58,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:58,833 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 [2018-10-03 08:35:58,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:58,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:58,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:58,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:58,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:58,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:35:58,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:35:58,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:35:58,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:35:58,907 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-03 08:35:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:59,080 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:35:59,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:35:59,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-03 08:35:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:59,081 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:35:59,081 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:35:59,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:35:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:35:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:35:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:35:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:35:59,084 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:35:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:59,085 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:35:59,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:35:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:35:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:35:59,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:59,085 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-03 08:35:59,086 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:59,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:59,086 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-03 08:35:59,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:59,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:59,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:59,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:59,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:59,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:59,664 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 [2018-10-03 08:35:59,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:59,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:35:59,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:59,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:59,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:59,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:35:59,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:35:59,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:35:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:35:59,743 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-03 08:35:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:59,856 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:35:59,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:35:59,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 08:35:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:59,857 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:35:59,857 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:35:59,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:35:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:35:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:35:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:35:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:35:59,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:35:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:59,861 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:35:59,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:35:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:35:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:35:59,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:59,861 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-03 08:35:59,862 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:59,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:59,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-03 08:35:59,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:59,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:59,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:59,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:59,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:00,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:00,285 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 [2018-10-03 08:36:00,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:00,321 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:00,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:00,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:00,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:00,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:36:00,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:36:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:36:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:36:00,358 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-03 08:36:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:00,419 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:36:00,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:36:00,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-03 08:36:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:00,421 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:36:00,421 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:36:00,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:36:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:36:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:36:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:36:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:36:00,425 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:36:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:00,426 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:36:00,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:36:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:36:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:36:00,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:00,427 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-03 08:36:00,427 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:00,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-03 08:36:00,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:00,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:00,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:00,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:00,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:00,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:00,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:00,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:00,904 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:36:00,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:00,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:00,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:00,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:36:00,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:36:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:36:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:36:00,952 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-03 08:36:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:01,040 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:36:01,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:36:01,040 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-03 08:36:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:01,040 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:36:01,041 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:36:01,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:36:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:36:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:36:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:36:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:36:01,044 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:36:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:01,044 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:36:01,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:36:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:36:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:36:01,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:01,045 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-03 08:36:01,045 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:01,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-03 08:36:01,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:01,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:01,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:02,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:02,194 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 [2018-10-03 08:36:02,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:02,310 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:36:02,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:02,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:02,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:02,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:36:02,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:36:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:36:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:36:02,356 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-03 08:36:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:02,635 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:36:02,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:36:02,636 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-03 08:36:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:02,637 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:36:02,637 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:36:02,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:36:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:36:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:36:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:36:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:36:02,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:36:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:02,640 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:36:02,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:36:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:36:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:36:02,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:02,641 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-03 08:36:02,641 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:02,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-03 08:36:02,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:02,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:02,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:02,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:02,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:03,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:03,243 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 [2018-10-03 08:36:03,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:03,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:03,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:03,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:36:03,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:36:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:36:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:36:03,310 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-03 08:36:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:03,362 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:36:03,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:36:03,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-03 08:36:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:03,363 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:36:03,363 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:36:03,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:36:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:36:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:36:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:36:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:36:03,368 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:36:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:03,369 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:36:03,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:36:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:36:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:36:03,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:03,369 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-03 08:36:03,370 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:03,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-03 08:36:03,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:03,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:03,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:03,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:03,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:04,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:04,092 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 [2018-10-03 08:36:04,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:04,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:04,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:04,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:04,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:04,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:36:04,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:36:04,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:36:04,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:36:04,181 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-03 08:36:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:04,246 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:36:04,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:36:04,247 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-03 08:36:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:04,247 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:36:04,247 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:36:04,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:36:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:36:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:36:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:36:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:36:04,252 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:36:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:04,252 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:36:04,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:36:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:36:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:36:04,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:04,253 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-03 08:36:04,253 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:04,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-03 08:36:04,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:04,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:04,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:04,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:04,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:05,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:05,825 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 [2018-10-03 08:36:05,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:05,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:36:05,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:05,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:05,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:05,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:36:05,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:36:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:36:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:36:05,908 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-03 08:36:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:05,974 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:36:05,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:36:05,975 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-03 08:36:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:05,976 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:36:05,976 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:36:05,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:36:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:36:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:36:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:36:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:36:05,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:36:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:05,980 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:36:05,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:36:05,980 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:36:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:36:05,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:05,981 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-03 08:36:05,981 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:05,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-03 08:36:05,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:05,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:05,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:05,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:05,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:06,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:06,838 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 [2018-10-03 08:36:06,847 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:06,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:06,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:06,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:06,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:06,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:36:06,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:36:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:36:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:36:06,922 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-03 08:36:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:06,988 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:36:06,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:36:06,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-03 08:36:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:06,989 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:36:06,989 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:36:06,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:36:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:36:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:36:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:36:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:36:06,993 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:36:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:06,993 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:36:06,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:36:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:36:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:36:06,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:06,994 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-03 08:36:06,994 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:06,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-03 08:36:06,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:06,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:06,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:06,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:06,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:07,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:07,764 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 [2018-10-03 08:36:07,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:07,821 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:36:07,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:07,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:07,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:07,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:36:07,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:36:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:36:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:36:07,856 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-03 08:36:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:07,966 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:36:07,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:36:07,966 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-03 08:36:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:07,967 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:36:07,967 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:36:07,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:36:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:36:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:36:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:36:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:36:07,969 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:36:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:07,970 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:36:07,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:36:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:36:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:36:07,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:07,970 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-03 08:36:07,970 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:07,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:07,971 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-03 08:36:07,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:07,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:07,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:07,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:07,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:08,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:08,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:08,895 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:08,936 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:36:08,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:08,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:08,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:08,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:36:08,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:36:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:36:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:36:08,970 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-03 08:36:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:09,020 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:36:09,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:36:09,020 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-03 08:36:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:09,021 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:36:09,021 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:36:09,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:36:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:36:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:36:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:36:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:36:09,025 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:36:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:09,026 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:36:09,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:36:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:36:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:36:09,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:09,026 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-03 08:36:09,027 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:09,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:09,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-03 08:36:09,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:09,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:09,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:09,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:09,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:09,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:09,864 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 [2018-10-03 08:36:09,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:09,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:09,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:09,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:36:09,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:36:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:36:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:36:09,939 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-03 08:36:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:10,026 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 08:36:10,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:36:10,026 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-03 08:36:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:10,027 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:36:10,027 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:36:10,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:36:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:36:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:36:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:36:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 08:36:10,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 08:36:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:10,031 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 08:36:10,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:36:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 08:36:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:36:10,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:10,032 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-03 08:36:10,032 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:10,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-03 08:36:10,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:10,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:10,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:10,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:10,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:10,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:10,939 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 [2018-10-03 08:36:10,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:10,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:10,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:10,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:11,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:11,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:36:11,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:36:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:36:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:36:11,024 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-03 08:36:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:11,268 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:36:11,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:36:11,268 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-03 08:36:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:11,269 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:36:11,269 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:36:11,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:36:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:36:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:36:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:36:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:36:11,273 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 08:36:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:11,273 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:36:11,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:36:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:36:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:36:11,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:11,274 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-03 08:36:11,274 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:11,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-03 08:36:11,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:11,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:11,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:11,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:11,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:12,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:12,060 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 [2018-10-03 08:36:12,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:12,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:36:12,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:12,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:12,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:12,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:36:12,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:36:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:36:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:36:12,156 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-03 08:36:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:12,791 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 08:36:12,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:36:12,791 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-03 08:36:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:12,792 INFO L225 Difference]: With dead ends: 46 [2018-10-03 08:36:12,792 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:36:12,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:36:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:36:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:36:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:36:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 08:36:12,796 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 08:36:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:12,796 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 08:36:12,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:36:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 08:36:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:36:12,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:12,796 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-03 08:36:12,797 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:12,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-03 08:36:12,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:12,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:12,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:12,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:12,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:13,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:13,750 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 [2018-10-03 08:36:13,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:13,811 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:13,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:13,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:13,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:13,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:36:13,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:36:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:36:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:36:13,859 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-03 08:36:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:14,049 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:36:14,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:36:14,050 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-03 08:36:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:14,050 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:36:14,050 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:36:14,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:36:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:36:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:36:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:36:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:36:14,053 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 08:36:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:14,053 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:36:14,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:36:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:36:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:36:14,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:14,054 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-03 08:36:14,054 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:14,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-03 08:36:14,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:14,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:14,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:14,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:14,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:15,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:15,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:15,485 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:15,530 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:36:15,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:15,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:15,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:15,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:36:15,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:36:15,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:36:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:36:15,563 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-03 08:36:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:15,616 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 08:36:15,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:36:15,617 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-03 08:36:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:15,617 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:36:15,618 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:36:15,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:36:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:36:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:36:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:36:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 08:36:15,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 08:36:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:15,621 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 08:36:15,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:36:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 08:36:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:36:15,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:15,622 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-03 08:36:15,622 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:15,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-03 08:36:15,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:15,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:15,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:15,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:15,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:16,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:16,417 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 [2018-10-03 08:36:16,423 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:16,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:36:16,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:16,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:16,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:16,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:36:16,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:36:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:36:16,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:36:16,508 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-03 08:36:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:16,587 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:36:16,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:36:16,587 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-03 08:36:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:16,588 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:36:16,588 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:36:16,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:36:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:36:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:36:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:36:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:36:16,592 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 08:36:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:16,592 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:36:16,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:36:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:36:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:36:16,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:16,593 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-03 08:36:16,593 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:16,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-03 08:36:16,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:16,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:16,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:16,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:16,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:17,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:17,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:17,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:17,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:17,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:17,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:36:17,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:36:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:36:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:36:17,545 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-03 08:36:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:17,688 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 08:36:17,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:36:17,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-03 08:36:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:17,689 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:36:17,689 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:36:17,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:36:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:36:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:36:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:36:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 08:36:17,692 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 08:36:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:17,692 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 08:36:17,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:36:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 08:36:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:36:17,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:17,693 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-03 08:36:17,693 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:17,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-03 08:36:17,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:17,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:17,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:17,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:19,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:19,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:19,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:19,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:19,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:19,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:19,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:19,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:36:19,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:36:19,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:36:19,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:36:19,589 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-03 08:36:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:19,646 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:36:19,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:36:19,646 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-03 08:36:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:19,647 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:36:19,647 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:36:19,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:36:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:36:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:36:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:36:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:36:19,651 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 08:36:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:19,651 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:36:19,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:36:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:36:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:36:19,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:19,652 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-03 08:36:19,652 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:19,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-03 08:36:19,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:19,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:19,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:19,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:19,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:20,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:20,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:20,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:20,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:36:20,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:20,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:20,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:20,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:36:20,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:36:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:36:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:36:20,887 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-03 08:36:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:21,285 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 08:36:21,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:36:21,286 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-03 08:36:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:21,286 INFO L225 Difference]: With dead ends: 52 [2018-10-03 08:36:21,287 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:36:21,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:36:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:36:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:36:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:36:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 08:36:21,290 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 08:36:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:21,290 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 08:36:21,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:36:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 08:36:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:36:21,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:21,291 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-03 08:36:21,292 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:21,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-03 08:36:21,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:21,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:21,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:21,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:21,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:22,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:22,340 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 [2018-10-03 08:36:22,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:22,387 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:22,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:22,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:22,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:22,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:36:22,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:36:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:36:22,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:36:22,424 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-03 08:36:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:22,494 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:36:22,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:36:22,495 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-03 08:36:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:22,496 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:36:22,496 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:36:22,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:36:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:36:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:36:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:36:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:36:22,499 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 08:36:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:22,500 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:36:22,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:36:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:36:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:36:22,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:22,501 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-03 08:36:22,501 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:22,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-03 08:36:22,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:22,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:22,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:23,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:23,517 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 [2018-10-03 08:36:23,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:23,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:36:23,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:23,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:23,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:23,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:36:23,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:36:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:36:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:36:23,612 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-03 08:36:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:23,734 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 08:36:23,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:36:23,735 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-03 08:36:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:23,736 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:36:23,736 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:36:23,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:36:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:36:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:36:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:36:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 08:36:23,740 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 08:36:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 08:36:23,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:36:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 08:36:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:36:23,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:23,741 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-03 08:36:23,741 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:23,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-03 08:36:23,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:23,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:23,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:23,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:23,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:25,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:25,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:25,239 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:25,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:36:25,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:25,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:25,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:25,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:36:25,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:36:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:36:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:36:25,325 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-03 08:36:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:25,456 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:36:25,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:36:25,457 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-03 08:36:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:25,458 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:36:25,458 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:36:25,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:36:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:36:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:36:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:36:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:36:25,463 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 08:36:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:25,464 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:36:25,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:36:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:36:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:36:25,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:25,464 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-03 08:36:25,465 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:25,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-03 08:36:25,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:25,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:25,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:25,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:25,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:26,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:26,435 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 [2018-10-03 08:36:26,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:26,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:26,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:26,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:36:26,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:36:26,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:36:26,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:36:26,523 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-03 08:36:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:26,613 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 08:36:26,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:36:26,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-03 08:36:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:26,614 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:36:26,614 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:36:26,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:36:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:36:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:36:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:36:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 08:36:26,616 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 08:36:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:26,617 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 08:36:26,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:36:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 08:36:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:36:26,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:26,617 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-03 08:36:26,618 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:26,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-03 08:36:26,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:26,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:26,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:26,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:26,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:27,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:27,680 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 [2018-10-03 08:36:27,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:27,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:27,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:27,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:27,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:27,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:36:27,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:36:27,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:36:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:36:27,797 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-03 08:36:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:27,996 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:36:27,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:36:27,997 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-03 08:36:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:27,998 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:36:27,998 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:36:27,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:36:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:36:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:36:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:36:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:36:28,000 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 08:36:28,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:28,001 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:36:28,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:36:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:36:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:36:28,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:28,001 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-03 08:36:28,002 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:28,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:28,002 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-03 08:36:28,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:28,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:28,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:28,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:28,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:29,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:29,117 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 [2018-10-03 08:36:29,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:29,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:36:29,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:29,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:29,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:29,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:36:29,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:36:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:36:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:36:29,249 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-03 08:36:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:29,553 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 08:36:29,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:36:29,554 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-03 08:36:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:29,555 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:36:29,555 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:36:29,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:36:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:36:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:36:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:36:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 08:36:29,558 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 08:36:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:29,559 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 08:36:29,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:36:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 08:36:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:36:29,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:29,560 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-03 08:36:29,560 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:29,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-10-03 08:36:29,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:29,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:29,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:29,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:31,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:31,008 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 [2018-10-03 08:36:31,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:31,058 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:31,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:31,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:31,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:31,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:36:31,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:36:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:36:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:36:31,097 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-03 08:36:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:31,186 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:36:31,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:36:31,187 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-03 08:36:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:31,188 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:36:31,188 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:36:31,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:36:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:36:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:36:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:36:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:36:31,192 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 08:36:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:31,192 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:36:31,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:36:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:36:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:36:31,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:31,193 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-03 08:36:31,193 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:31,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-10-03 08:36:31,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:31,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:31,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:31,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:31,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:32,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:32,383 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 [2018-10-03 08:36:32,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:32,450 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:36:32,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:32,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:32,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:32,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:36:32,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:36:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:36:32,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:36:32,497 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-03 08:36:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:32,587 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 08:36:32,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:36:32,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-03 08:36:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:32,588 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:36:32,588 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:36:32,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:36:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:36:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:36:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:36:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 08:36:32,591 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 08:36:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:32,592 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 08:36:32,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:36:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 08:36:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:36:32,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:32,592 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-03 08:36:32,592 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:32,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-10-03 08:36:32,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:32,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:32,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:32,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:32,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:33,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:33,702 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 [2018-10-03 08:36:33,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:33,761 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 08:36:33,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:33,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:33,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:33,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:36:33,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:36:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:36:33,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:36:33,800 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-03 08:36:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:33,902 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:36:33,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:36:33,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-03 08:36:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:33,903 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:36:33,903 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:36:33,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:36:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:36:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:36:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:36:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:36:33,907 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 08:36:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:33,907 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:36:33,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:36:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:36:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:36:33,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:33,908 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-03 08:36:33,908 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:33,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-10-03 08:36:33,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:33,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:33,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:33,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:33,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:35,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:35,301 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 [2018-10-03 08:36:35,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:35,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:35,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:35,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:36:35,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:36:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:36:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:36:35,397 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-03 08:36:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:35,569 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 08:36:35,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:36:35,570 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-03 08:36:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:35,570 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:36:35,570 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 08:36:35,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:36:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 08:36:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 08:36:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:36:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 08:36:35,574 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 08:36:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:35,574 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 08:36:35,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:36:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 08:36:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 08:36:35,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:35,575 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-03 08:36:35,575 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:35,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-10-03 08:36:35,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:35,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:35,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:36,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:36,920 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 [2018-10-03 08:36:36,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:36,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:36,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:36,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:37,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:37,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:36:37,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:36:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:36:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:36:37,026 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-03 08:36:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:37,134 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:36:37,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:36:37,135 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-03 08:36:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:37,136 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:36:37,136 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:36:37,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:36:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:36:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:36:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:36:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:36:37,139 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 08:36:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:37,140 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:36:37,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:36:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:36:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:36:37,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:37,140 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-03 08:36:37,140 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:37,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-10-03 08:36:37,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:37,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:37,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:37,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:37,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:38,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:38,757 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 [2018-10-03 08:36:38,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:38,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:36:38,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:38,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:38,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:38,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:36:38,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:36:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:36:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:36:38,879 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-03 08:36:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:39,012 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 08:36:39,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:36:39,012 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-03 08:36:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:39,013 INFO L225 Difference]: With dead ends: 64 [2018-10-03 08:36:39,013 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:36:39,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:36:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:36:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 08:36:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:36:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 08:36:39,016 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 08:36:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:39,016 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 08:36:39,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:36:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 08:36:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 08:36:39,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:39,017 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-03 08:36:39,017 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:39,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-10-03 08:36:39,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:39,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:39,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:39,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:39,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:40,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:40,876 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 [2018-10-03 08:36:40,885 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:40,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:40,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:40,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:40,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:40,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:36:40,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:36:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:36:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:36:40,968 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-03 08:36:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:41,078 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:36:41,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:36:41,078 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-03 08:36:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:41,079 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:36:41,079 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:36:41,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:36:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:36:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:36:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:36:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:36:41,082 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 08:36:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:41,082 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:36:41,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:36:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:36:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:36:41,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:41,084 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-03 08:36:41,084 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:41,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-10-03 08:36:41,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:41,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:41,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:41,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:41,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:43,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:43,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:43,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:43,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:36:43,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:43,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:43,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:43,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:36:43,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:36:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:36:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:36:43,739 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-03 08:36:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:43,922 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 08:36:43,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:36:43,923 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-03 08:36:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:43,923 INFO L225 Difference]: With dead ends: 66 [2018-10-03 08:36:43,924 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:36:43,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:36:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:36:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 08:36:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:36:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 08:36:43,926 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 08:36:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:43,926 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 08:36:43,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:36:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 08:36:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:36:43,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:43,927 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-03 08:36:43,927 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:43,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-10-03 08:36:43,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:43,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:43,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:43,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:45,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:45,315 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 [2018-10-03 08:36:45,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:45,385 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:36:45,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:45,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:45,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:45,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:36:45,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:36:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:36:45,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:36:45,438 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-03 08:36:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:45,633 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:36:45,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:36:45,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-03 08:36:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:45,633 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:36:45,633 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:36:45,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:36:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:36:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:36:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:36:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:36:45,636 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 08:36:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:45,636 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:36:45,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:36:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:36:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:36:45,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:45,636 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-03 08:36:45,637 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:45,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-10-03 08:36:45,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:45,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:45,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:45,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:45,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:47,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:47,119 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 [2018-10-03 08:36:47,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:47,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:47,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:47,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:36:47,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:36:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:36:47,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:36:47,228 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-03 08:36:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:47,375 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 08:36:47,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:36:47,375 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-03 08:36:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:47,376 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:36:47,376 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:36:47,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:36:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:36:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:36:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:36:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 08:36:47,379 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 08:36:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:47,380 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 08:36:47,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:36:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 08:36:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:36:47,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:47,380 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-03 08:36:47,380 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:47,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-10-03 08:36:47,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:47,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:47,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:47,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:47,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:48,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:48,939 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 [2018-10-03 08:36:48,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:48,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:48,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:49,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:49,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:49,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:36:49,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:36:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:36:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:36:49,048 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-03 08:36:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:49,241 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:36:49,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:36:49,241 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-03 08:36:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:49,242 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:36:49,242 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:36:49,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:36:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:36:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:36:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:36:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:36:49,246 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 08:36:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:49,247 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:36:49,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:36:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:36:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:36:49,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:49,247 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-03 08:36:49,248 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:49,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-10-03 08:36:49,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:49,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:49,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:49,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:49,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:51,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:51,983 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 [2018-10-03 08:36:51,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:52,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:36:52,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:52,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:52,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:52,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:36:52,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:36:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:36:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:36:52,109 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-03 08:36:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:52,292 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 08:36:52,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:36:52,295 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-03 08:36:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:52,295 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:36:52,296 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:36:52,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:36:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:36:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 08:36:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:36:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 08:36:52,299 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 08:36:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:52,299 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 08:36:52,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:36:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 08:36:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:36:52,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:52,301 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-03 08:36:52,302 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:52,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-10-03 08:36:52,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:52,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:52,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:52,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:52,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:54,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:54,235 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 [2018-10-03 08:36:54,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:54,293 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:54,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:54,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:54,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:54,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:36:54,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:36:54,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:36:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:36:54,340 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-03 08:36:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:54,534 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:36:54,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:36:54,535 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-03 08:36:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:54,535 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:36:54,535 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:36:54,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:36:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:36:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:36:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:36:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:36:54,540 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 08:36:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:54,540 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:36:54,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:36:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:36:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:36:54,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:54,540 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-03 08:36:54,541 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:54,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-10-03 08:36:54,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:54,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:54,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:54,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:54,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:56,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:56,441 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 [2018-10-03 08:36:56,447 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:56,517 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:36:56,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:56,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:56,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:56,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:36:56,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:36:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:36:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:36:56,573 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-03 08:36:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:57,886 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 08:36:57,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:36:57,887 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-03 08:36:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:57,887 INFO L225 Difference]: With dead ends: 72 [2018-10-03 08:36:57,887 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 08:36:57,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:36:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 08:36:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 08:36:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:36:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 08:36:57,890 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 08:36:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:57,890 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 08:36:57,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:36:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 08:36:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 08:36:57,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:57,891 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-03 08:36:57,891 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:57,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:57,892 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-10-03 08:36:57,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:57,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:57,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:57,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:57,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:59,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:59,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:36:59,530 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:59,602 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 08:36:59,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:59,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:59,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:59,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:36:59,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:36:59,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:36:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:36:59,659 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-03 08:36:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:59,936 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:36:59,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:36:59,937 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-03 08:36:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:59,938 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:36:59,938 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:36:59,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:36:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:36:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:36:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:36:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:36:59,941 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-03 08:36:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:59,941 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:36:59,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:36:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:36:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:36:59,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:59,942 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-03 08:36:59,942 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:59,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-10-03 08:36:59,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:59,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:59,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:59,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:59,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:01,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:01,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:01,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:01,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:01,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:01,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:37:01,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:37:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:37:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:37:01,891 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-03 08:37:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:02,025 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-03 08:37:02,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:37:02,026 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-03 08:37:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:02,027 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:37:02,027 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 08:37:02,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:37:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 08:37:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 08:37:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:37:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-03 08:37:02,030 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-03 08:37:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:02,031 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-03 08:37:02,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:37:02,031 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-03 08:37:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 08:37:02,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:02,031 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-03 08:37:02,031 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:02,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-10-03 08:37:02,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:02,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:02,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:02,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:02,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:03,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:03,808 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 [2018-10-03 08:37:03,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:37:03,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:37:03,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:03,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:03,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:03,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:37:03,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:37:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:37:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:37:03,904 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-03 08:37:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:04,101 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:37:04,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:37:04,101 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-03 08:37:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:04,102 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:37:04,102 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:37:04,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:37:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:37:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:37:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:37:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:37:04,104 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-03 08:37:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:04,104 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:37:04,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:37:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:37:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:37:04,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:04,105 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-03 08:37:04,105 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:04,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-10-03 08:37:04,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:04,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:04,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:04,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:04,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:05,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:05,876 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 [2018-10-03 08:37:05,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:37:05,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:37:05,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:05,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:06,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:06,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:37:06,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:37:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:37:06,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:37:06,002 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-03 08:37:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:06,222 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-03 08:37:06,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:37:06,223 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-03 08:37:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:06,223 INFO L225 Difference]: With dead ends: 76 [2018-10-03 08:37:06,223 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:37:06,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:37:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:37:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 08:37:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:37:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-03 08:37:06,227 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-03 08:37:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:06,227 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-03 08:37:06,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:37:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-03 08:37:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:37:06,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:06,228 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-03 08:37:06,228 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:06,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-10-03 08:37:06,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:06,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:06,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:06,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:06,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:08,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:08,126 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 [2018-10-03 08:37:08,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:37:08,209 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:37:08,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:08,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:08,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:08,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:37:08,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:37:08,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:37:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:37:08,254 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-03 08:37:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:08,512 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:37:08,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:37:08,520 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-03 08:37:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:08,520 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:37:08,520 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:37:08,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:37:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:37:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:37:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:37:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:37:08,524 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-03 08:37:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:08,524 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:37:08,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:37:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:37:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:37:08,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:08,525 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-03 08:37:08,525 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:08,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:08,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-10-03 08:37:08,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:08,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:08,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:08,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:08,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:10,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:10,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:10,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:37:10,677 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:37:10,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:10,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:10,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:10,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:37:10,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:37:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:37:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:37:10,730 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-03 08:37:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:10,884 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-03 08:37:10,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:37:10,885 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-03 08:37:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:10,886 INFO L225 Difference]: With dead ends: 78 [2018-10-03 08:37:10,886 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:37:10,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:37:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:37:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:37:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:37:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-03 08:37:10,889 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-03 08:37:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:10,889 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-03 08:37:10,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:37:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-03 08:37:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 08:37:10,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:10,890 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-03 08:37:10,890 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:10,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-10-03 08:37:10,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:10,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:10,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:10,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:13,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:13,247 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 [2018-10-03 08:37:13,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:37:13,332 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:37:13,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:13,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:13,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:13,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:37:13,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:37:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:37:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:37:13,379 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-03 08:37:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:13,485 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:37:13,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:37:13,486 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-03 08:37:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:13,487 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:37:13,487 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:37:13,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:37:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:37:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:37:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:37:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:37:13,491 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-03 08:37:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:13,492 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:37:13,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:37:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:37:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:37:13,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:13,492 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-03 08:37:13,492 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:13,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-10-03 08:37:13,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:13,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:13,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:13,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:13,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:15,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:15,401 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 [2018-10-03 08:37:15,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:15,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:15,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:15,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:37:15,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:37:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:37:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:37:15,517 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-03 08:37:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:15,671 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-03 08:37:15,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:37:15,672 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-03 08:37:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:15,672 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:37:15,672 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:37:15,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:37:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:37:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 08:37:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:37:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-03 08:37:15,675 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-03 08:37:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:15,675 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-03 08:37:15,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:37:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-03 08:37:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:37:15,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:15,676 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-03 08:37:15,676 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:15,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-10-03 08:37:15,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:15,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:15,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:15,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:15,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:18,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:18,012 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 [2018-10-03 08:37:18,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:37:18,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:37:18,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:18,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:18,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:18,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:37:18,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:37:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:37:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:37:18,115 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-03 08:37:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:18,273 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:37:18,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:37:18,273 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-03 08:37:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:18,274 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:37:18,274 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:37:18,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:37:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:37:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:37:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:37:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:37:18,277 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-03 08:37:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:18,277 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:37:18,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:37:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:37:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:37:18,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:18,278 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-03 08:37:18,278 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:18,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-10-03 08:37:18,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:18,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:18,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:18,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:18,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:20,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:20,281 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 [2018-10-03 08:37:20,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:37:20,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:37:20,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:20,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:20,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:20,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:37:20,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:37:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:37:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:37:20,425 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-03 08:37:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:20,897 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-03 08:37:20,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:37:20,897 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-03 08:37:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:20,898 INFO L225 Difference]: With dead ends: 82 [2018-10-03 08:37:20,898 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:37:20,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:37:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:37:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 08:37:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:37:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-03 08:37:20,901 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-03 08:37:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:20,901 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-03 08:37:20,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:37:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-03 08:37:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:37:20,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:20,902 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-03 08:37:20,902 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:20,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:20,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-10-03 08:37:20,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:20,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:20,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:20,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:20,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:23,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:23,234 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 [2018-10-03 08:37:23,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:37:23,305 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:37:23,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:23,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:23,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:23,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:37:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:37:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:37:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:37:23,353 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-03 08:37:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:24,485 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:37:24,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:37:24,485 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-03 08:37:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:24,486 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:37:24,486 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:37:24,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:37:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:37:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:37:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:37:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:37:24,490 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-03 08:37:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:24,490 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:37:24,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:37:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:37:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:37:24,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:24,491 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-03 08:37:24,491 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:24,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:24,491 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-10-03 08:37:24,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:24,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:24,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:24,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:24,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:27,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:27,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:27,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:37:27,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:37:27,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:27,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:27,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:27,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:37:27,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:37:27,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:37:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:37:27,630 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-03 08:37:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:28,879 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-03 08:37:28,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:37:28,879 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-03 08:37:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:28,880 INFO L225 Difference]: With dead ends: 84 [2018-10-03 08:37:28,880 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 08:37:28,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:37:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 08:37:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 08:37:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:37:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-03 08:37:28,885 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-03 08:37:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:28,885 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-03 08:37:28,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:37:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-03 08:37:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-03 08:37:28,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:28,886 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-03 08:37:28,886 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:28,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:28,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-10-03 08:37:28,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:28,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:28,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:28,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:28,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:31,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:31,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:31,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:37:31,589 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-03 08:37:31,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:31,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:31,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:31,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:37:31,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:37:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:37:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:37:31,648 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-03 08:37:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:31,981 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:37:31,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:37:31,985 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-03 08:37:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:31,985 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:37:31,985 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:37:31,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:37:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:37:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:37:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:37:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:37:31,989 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-03 08:37:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:31,989 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:37:31,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:37:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:37:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:37:31,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:31,990 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-03 08:37:31,990 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:31,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-10-03 08:37:31,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:31,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:31,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:31,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:31,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:34,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:34,786 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 [2018-10-03 08:37:34,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:34,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:34,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:34,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:37:34,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:37:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:37:34,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:37:34,913 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-03 08:37:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:35,278 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-03 08:37:35,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:37:35,279 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-03 08:37:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:35,280 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:37:35,280 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:37:35,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:37:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:37:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-03 08:37:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:37:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-03 08:37:35,282 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-03 08:37:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:35,282 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-03 08:37:35,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:37:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-03 08:37:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:37:35,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:35,283 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-03 08:37:35,283 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:35,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:35,283 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-10-03 08:37:35,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:35,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:35,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:35,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:35,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:38,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:38,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:38,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:37:38,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:37:38,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:38,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:38,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:38,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:37:38,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:37:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:37:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:37:38,131 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-03 08:37:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:38,315 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:37:38,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:37:38,316 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-03 08:37:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:38,316 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:37:38,316 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:37:38,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:37:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:37:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:37:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:37:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:37:38,319 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-03 08:37:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:38,319 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:37:38,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:37:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:37:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:37:38,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:38,320 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-03 08:37:38,320 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:38,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-10-03 08:37:38,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:38,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:38,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:38,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:38,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:40,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:40,918 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 [2018-10-03 08:37:40,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:37:41,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 08:37:41,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:41,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:41,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:41,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:37:41,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:37:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:37:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:37:41,054 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-03 08:37:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:41,245 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-03 08:37:41,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:37:41,245 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-03 08:37:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:41,246 INFO L225 Difference]: With dead ends: 88 [2018-10-03 08:37:41,246 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:37:41,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:37:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:37:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 08:37:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:37:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-03 08:37:41,249 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-03 08:37:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:41,249 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-03 08:37:41,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:37:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-03 08:37:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-03 08:37:41,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:41,250 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-03 08:37:41,250 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:41,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-10-03 08:37:41,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:41,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:41,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:41,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:41,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:44,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:44,045 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 [2018-10-03 08:37:44,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:37:44,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:37:44,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:44,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:44,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:44,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:37:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:37:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:37:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:37:44,180 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-03 08:37:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:44,342 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:37:44,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:37:44,343 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-03 08:37:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:44,344 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:37:44,344 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:37:44,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:37:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:37:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:37:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:37:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:37:44,348 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-03 08:37:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:44,348 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:37:44,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:37:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:37:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:37:44,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:44,349 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-03 08:37:44,349 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:44,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-10-03 08:37:44,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:44,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:44,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:44,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:44,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:46,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:46,817 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 [2018-10-03 08:37:46,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:37:46,936 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:37:46,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:46,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:46,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:46,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:37:46,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:37:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:37:46,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:37:46,978 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-03 08:37:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:47,379 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-03 08:37:47,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:37:47,379 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-03 08:37:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:47,380 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:37:47,380 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 08:37:47,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:37:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 08:37:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-03 08:37:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 08:37:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-03 08:37:47,382 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-03 08:37:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:47,383 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-03 08:37:47,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:37:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-03 08:37:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 08:37:47,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:47,383 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-03 08:37:47,383 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:47,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-10-03 08:37:47,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:47,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:47,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:47,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:47,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:49,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:49,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:49,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:37:50,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:37:50,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:50,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:50,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:50,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:37:50,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:37:50,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:37:50,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:37:50,061 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-03 08:37:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:50,280 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:37:50,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:37:50,280 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-03 08:37:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:50,281 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:37:50,281 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:37:50,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:37:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:37:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:37:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:37:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:37:50,284 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-03 08:37:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:50,284 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:37:50,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:37:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:37:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:37:50,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:50,285 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-03 08:37:50,285 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:50,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-10-03 08:37:50,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:50,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:50,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:50,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:50,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:53,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:53,235 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 [2018-10-03 08:37:53,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:53,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:53,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:53,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:37:53,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:37:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:37:53,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:37:53,351 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-03 08:37:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:53,515 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-03 08:37:53,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:37:53,516 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-03 08:37:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:53,517 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:37:53,517 INFO L226 Difference]: Without dead ends: 90 [2018-10-03 08:37:53,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:37:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-03 08:37:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-03 08:37:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:37:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-03 08:37:53,520 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-03 08:37:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:53,520 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-03 08:37:53,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:37:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-03 08:37:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 08:37:53,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:53,521 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-03 08:37:53,521 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:53,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-10-03 08:37:53,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:53,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:53,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:53,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:53,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:56,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:56,315 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 [2018-10-03 08:37:56,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:37:56,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:37:56,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:56,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:56,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:56,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:37:56,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:37:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:37:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:37:56,428 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-03 08:37:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:56,633 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:37:56,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:37:56,634 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-03 08:37:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:56,634 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:37:56,634 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:37:56,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:37:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:37:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:37:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:37:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:37:56,637 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-03 08:37:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:56,637 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:37:56,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:37:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:37:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:37:56,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:56,638 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-03 08:37:56,638 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:56,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-10-03 08:37:56,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:56,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:56,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:56,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:56,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:59,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:59,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:37:59,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:37:59,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 08:37:59,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:59,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:59,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:59,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:37:59,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:37:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:37:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:37:59,782 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-03 08:37:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:59,978 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-03 08:37:59,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:37:59,979 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-03 08:37:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:59,980 INFO L225 Difference]: With dead ends: 94 [2018-10-03 08:37:59,980 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 08:37:59,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:37:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 08:37:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-03 08:37:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 08:37:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-03 08:37:59,983 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-03 08:37:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:59,983 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-03 08:37:59,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:37:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-03 08:37:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-03 08:37:59,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:59,984 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-03 08:37:59,984 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:59,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-10-03 08:37:59,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:59,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:59,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:59,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:59,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:03,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:03,060 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 [2018-10-03 08:38:03,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:38:03,139 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:38:03,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:03,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:03,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:03,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:38:03,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:38:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:38:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:38:03,180 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-03 08:38:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:03,323 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:38:03,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:38:03,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-03 08:38:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:03,324 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:38:03,324 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:38:03,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:38:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:38:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:38:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:38:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:38:03,327 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-03 08:38:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:03,327 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:38:03,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:38:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:38:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:38:03,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:03,328 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-03 08:38:03,328 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:03,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-10-03 08:38:03,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:03,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:03,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:03,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:03,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:06,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:06,199 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 [2018-10-03 08:38:06,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:38:06,308 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 08:38:06,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:06,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:06,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:06,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:38:06,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:38:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:38:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:38:06,354 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-03 08:38:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:06,572 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-03 08:38:06,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:38:06,572 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-03 08:38:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:06,573 INFO L225 Difference]: With dead ends: 96 [2018-10-03 08:38:06,573 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:38:06,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:38:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:38:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-03 08:38:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:38:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-03 08:38:06,576 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-03 08:38:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:06,576 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-03 08:38:06,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:38:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-03 08:38:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:38:06,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:06,576 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-03 08:38:06,577 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:06,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-10-03 08:38:06,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:06,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:06,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:06,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:06,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:09,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:09,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:38:09,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:38:09,780 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-03 08:38:09,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:09,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:09,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:09,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:38:09,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:38:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:38:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:38:09,824 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-03 08:38:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:10,059 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:38:10,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:38:10,060 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-03 08:38:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:10,060 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:38:10,060 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:38:10,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:38:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:38:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:38:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:38:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:38:10,063 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-03 08:38:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:10,064 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:38:10,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:38:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:38:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:38:10,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:10,064 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-03 08:38:10,065 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:10,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-10-03 08:38:10,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:10,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:10,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:10,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:10,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:13,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:13,344 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 [2018-10-03 08:38:13,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:38:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:13,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:13,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:13,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:38:13,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:38:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:38:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:38:13,468 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-03 08:38:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:13,695 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-03 08:38:13,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:38:13,695 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-03 08:38:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:13,696 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:38:13,696 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:38:13,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:38:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:38:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-03 08:38:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:38:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-03 08:38:13,698 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-03 08:38:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:13,699 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-03 08:38:13,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:38:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-03 08:38:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-03 08:38:13,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:13,699 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-03 08:38:13,699 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:13,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-10-03 08:38:13,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:13,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:13,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:13,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:38:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:16,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:16,733 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 [2018-10-03 08:38:16,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:38:16,813 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:38:16,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:16,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:16,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:16,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:38:16,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:38:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:38:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:38:16,856 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-03 08:38:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:17,041 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:38:17,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:38:17,042 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-03 08:38:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:17,042 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:38:17,042 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:38:17,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:38:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:38:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:38:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:38:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:38:17,045 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-03 08:38:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:17,046 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:38:17,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:38:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:38:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:38:17,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:17,046 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-03 08:38:17,046 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:17,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-10-03 08:38:17,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:17,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:17,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:17,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:17,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:20,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:20,755 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 [2018-10-03 08:38:20,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:38:20,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-03 08:38:20,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:20,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:20,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:20,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:38:20,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:38:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:38:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:38:20,913 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-03 08:38:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:21,106 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-03 08:38:21,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:38:21,106 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-03 08:38:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:21,107 INFO L225 Difference]: With dead ends: 100 [2018-10-03 08:38:21,107 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:38:21,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:38:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:38:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-03 08:38:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-03 08:38:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-03 08:38:21,109 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-03 08:38:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:21,110 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-03 08:38:21,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:38:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-03 08:38:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-03 08:38:21,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:21,110 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-03 08:38:21,111 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:21,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:21,111 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-10-03 08:38:21,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:21,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:21,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:21,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:21,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:24,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:24,548 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 [2018-10-03 08:38:24,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:38:24,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:38:24,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:24,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:24,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:24,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:38:24,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:38:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:38:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:38:24,691 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-03 08:38:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:24,893 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:38:24,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:38:24,894 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-03 08:38:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:24,894 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:38:24,894 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:38:24,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:38:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:38:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:38:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:38:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:38:24,898 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-03 08:38:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:24,898 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:38:24,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:38:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:38:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:38:24,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:24,899 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-03 08:38:24,899 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:24,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-10-03 08:38:24,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:24,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:24,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:24,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:24,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:28,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:28,442 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 [2018-10-03 08:38:28,450 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:38:28,561 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:38:28,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:28,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:28,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:28,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:38:28,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:38:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:38:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:38:28,606 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-03 08:38:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:29,230 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-03 08:38:29,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:38:29,231 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-03 08:38:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:29,231 INFO L225 Difference]: With dead ends: 102 [2018-10-03 08:38:29,231 INFO L226 Difference]: Without dead ends: 100 [2018-10-03 08:38:29,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:38:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-03 08:38:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-03 08:38:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:38:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-03 08:38:29,234 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-03 08:38:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:29,234 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-03 08:38:29,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:38:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-03 08:38:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-03 08:38:29,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:29,235 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-03 08:38:29,236 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:29,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-10-03 08:38:29,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:29,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:29,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:29,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:29,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:32,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:32,552 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 [2018-10-03 08:38:32,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:38:32,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:38:32,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:32,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:32,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:32,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:38:32,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:38:32,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:38:32,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:38:32,711 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-03 08:38:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:33,012 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:38:33,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:38:33,012 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-03 08:38:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:33,013 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:38:33,013 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:38:33,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:38:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:38:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:38:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:38:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:38:33,016 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-03 08:38:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:33,016 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:38:33,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:38:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:38:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:38:33,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:33,017 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-03 08:38:33,017 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:33,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-10-03 08:38:33,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:33,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:33,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:36,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:36,590 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 [2018-10-03 08:38:36,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:38:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:36,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:36,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:36,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:38:36,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:38:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:38:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:38:36,716 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-03 08:38:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:36,975 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-03 08:38:36,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:38:36,975 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-03 08:38:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:36,976 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:38:36,976 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 08:38:36,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:38:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 08:38:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-03 08:38:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-03 08:38:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-03 08:38:36,979 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-03 08:38:36,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:36,979 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-03 08:38:36,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:38:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-03 08:38:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 08:38:36,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:36,979 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-03 08:38:36,980 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:36,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-10-03 08:38:36,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:36,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:36,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:36,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:38:36,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:40,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:40,664 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 [2018-10-03 08:38:40,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:38:40,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:38:40,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:40,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:40,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:40,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:38:40,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:38:40,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:38:40,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:38:40,804 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-03 08:38:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:41,010 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:38:41,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:38:41,011 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-03 08:38:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:41,011 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:38:41,011 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:38:41,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:38:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:38:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:38:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:38:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:38:41,014 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-03 08:38:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:41,015 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:38:41,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:38:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:38:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:38:41,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:41,015 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-03 08:38:41,016 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:41,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-10-03 08:38:41,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:41,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:41,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:41,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:41,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:44,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:44,794 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 [2018-10-03 08:38:44,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:38:44,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-03 08:38:44,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:44,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:44,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:44,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:38:44,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:38:44,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:38:44,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:38:44,957 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-03 08:38:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:45,229 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-03 08:38:45,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:38:45,229 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-03 08:38:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:45,230 INFO L225 Difference]: With dead ends: 106 [2018-10-03 08:38:45,230 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:38:45,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:38:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:38:45,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-03 08:38:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:38:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-03 08:38:45,233 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-03 08:38:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:45,233 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-03 08:38:45,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:38:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-03 08:38:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:38:45,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:45,234 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-03 08:38:45,234 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:45,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:45,235 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-10-03 08:38:45,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:45,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:45,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:45,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:45,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:49,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:49,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:38:49,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:38:49,129 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:38:49,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:49,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:49,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:49,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:38:49,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:38:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:38:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:38:49,176 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-03 08:38:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:49,378 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:38:49,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:38:49,379 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-03 08:38:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:49,380 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:38:49,380 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:38:49,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:38:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:38:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:38:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:38:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:38:49,384 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-03 08:38:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:49,385 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:38:49,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:38:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:38:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:38:49,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:49,386 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-03 08:38:49,386 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:49,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-10-03 08:38:49,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:49,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:49,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:49,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:49,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:53,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:53,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:38:53,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:38:53,214 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-03 08:38:53,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:53,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:53,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:53,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:38:53,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:38:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:38:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:38:53,277 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-03 08:38:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:53,552 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-03 08:38:53,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:38:53,552 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-03 08:38:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:53,553 INFO L225 Difference]: With dead ends: 108 [2018-10-03 08:38:53,553 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 08:38:53,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:38:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 08:38:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 08:38:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:38:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-03 08:38:53,557 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-03 08:38:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:53,557 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-03 08:38:53,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:38:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-03 08:38:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-03 08:38:53,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:53,558 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-03 08:38:53,558 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:53,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:53,559 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-10-03 08:38:53,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:53,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:53,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:53,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:53,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:57,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:57,652 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 [2018-10-03 08:38:57,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:38:57,778 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-03 08:38:57,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:57,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:57,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:57,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:38:57,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:38:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:38:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:38:57,827 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-03 08:38:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:58,109 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:38:58,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:38:58,110 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-03 08:38:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:58,110 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:38:58,110 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:38:58,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:38:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:38:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:38:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:38:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:38:58,114 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-03 08:38:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:58,114 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:38:58,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:38:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:38:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:38:58,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:58,115 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-03 08:38:58,115 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:58,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-10-03 08:38:58,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:58,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:58,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:58,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:58,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:02,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:02,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:39:02,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:02,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:02,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:02,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:39:02,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:39:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:39:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:39:02,343 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-03 08:39:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:02,662 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-03 08:39:02,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:39:02,664 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-03 08:39:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:02,664 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:39:02,664 INFO L226 Difference]: Without dead ends: 108 [2018-10-03 08:39:02,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:39:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-03 08:39:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-03 08:39:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 08:39:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-03 08:39:02,667 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-03 08:39:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:02,667 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-03 08:39:02,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:39:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-03 08:39:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 08:39:02,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:02,667 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-03 08:39:02,668 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:02,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-10-03 08:39:02,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:02,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:02,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:02,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:02,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:06,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:06,822 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 [2018-10-03 08:39:06,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:06,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:06,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:06,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:06,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:06,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:39:06,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:39:06,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:39:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:39:06,965 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-03 08:39:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,180 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:39:07,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:39:07,181 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-03 08:39:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,181 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:39:07,181 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:39:07,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:39:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:39:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:39:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:39:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:39:07,185 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-03 08:39:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,185 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:39:07,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:39:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:39:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:39:07,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,186 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-03 08:39:07,186 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-10-03 08:39:07,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:07,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:11,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:11,435 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 [2018-10-03 08:39:11,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:11,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-03 08:39:11,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:11,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:11,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:11,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:39:11,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:39:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:39:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:39:11,611 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-03 08:39:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:11,921 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-03 08:39:11,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:39:11,921 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-03 08:39:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:11,921 INFO L225 Difference]: With dead ends: 112 [2018-10-03 08:39:11,921 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 08:39:11,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:39:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 08:39:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-03 08:39:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 08:39:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-03 08:39:11,924 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-03 08:39:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:11,924 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-03 08:39:11,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:39:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-03 08:39:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-03 08:39:11,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:11,925 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-03 08:39:11,925 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:11,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-10-03 08:39:11,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:11,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:11,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:11,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:11,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:16,157 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 [2018-10-03 08:39:16,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:16,245 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:16,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:16,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:16,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:39:16,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:39:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:39:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:39:16,294 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-03 08:39:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,639 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:39:16,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:39:16,640 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-03 08:39:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,640 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:39:16,640 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:39:16,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:39:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:39:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:39:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:39:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:39:16,643 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-03 08:39:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,643 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:39:16,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:39:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:39:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:39:16,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,644 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-03 08:39:16,645 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-10-03 08:39:16,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:21,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:39:21,215 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:21,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-03 08:39:21,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:21,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:21,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:39:21,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:39:21,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:39:21,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:39:21,405 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-03 08:39:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:21,715 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-03 08:39:21,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:39:21,716 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-03 08:39:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:21,716 INFO L225 Difference]: With dead ends: 114 [2018-10-03 08:39:21,716 INFO L226 Difference]: Without dead ends: 112 [2018-10-03 08:39:21,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:39:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-03 08:39:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-03 08:39:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 08:39:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-03 08:39:21,719 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-03 08:39:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:21,719 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-03 08:39:21,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:39:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-03 08:39:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 08:39:21,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:21,720 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-03 08:39:21,720 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:21,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:21,720 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-10-03 08:39:21,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:21,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:21,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:21,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:26,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:26,164 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 [2018-10-03 08:39:26,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:26,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:39:26,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:26,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:26,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:26,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-03 08:39:26,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-03 08:39:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-03 08:39:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:39:26,348 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-03 08:39:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:26,673 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-03 08:39:26,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-03 08:39:26,674 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-03 08:39:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:26,674 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:39:26,674 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:39:26,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:39:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:39:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:39:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:39:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-03 08:39:26,677 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-03 08:39:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:26,677 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-03 08:39:26,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-03 08:39:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-03 08:39:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:39:26,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:26,677 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-03 08:39:26,678 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:26,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-10-03 08:39:26,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:26,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:26,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:26,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:31,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:31,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:31,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:31,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-03 08:39:31,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-03 08:39:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-03 08:39:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:39:31,299 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-03 08:39:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:31,579 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-03 08:39:31,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-03 08:39:31,580 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-03 08:39:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:31,580 INFO L225 Difference]: With dead ends: 116 [2018-10-03 08:39:31,580 INFO L226 Difference]: Without dead ends: 114 [2018-10-03 08:39:31,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:39:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-03 08:39:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-03 08:39:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-03 08:39:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-03 08:39:31,583 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-03 08:39:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:31,584 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-03 08:39:31,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-03 08:39:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-03 08:39:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-03 08:39:31,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:31,584 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-03 08:39:31,585 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:31,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-10-03 08:39:31,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:31,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:36,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:36,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:36,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:36,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:36,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:36,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:36,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:36,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-03 08:39:36,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-03 08:39:36,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-03 08:39:36,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-03 08:39:36,420 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-03 08:39:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:36,751 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-03 08:39:36,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-03 08:39:36,752 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-03 08:39:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:36,752 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:39:36,752 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:39:36,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-03 08:39:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:39:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:39:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:39:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-03 08:39:36,755 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-03 08:39:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:36,756 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-03 08:39:36,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-03 08:39:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-03 08:39:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:39:36,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:36,756 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-03 08:39:36,757 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:36,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-10-03 08:39:36,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:36,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:39:37,730 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:39:37,735 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:39:37,736 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:39:37 BoogieIcfgContainer [2018-10-03 08:39:37,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:39:37,736 INFO L168 Benchmark]: Toolchain (without parser) took 232860.58 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -136.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 330.5 MB). Peak memory consumption was 194.2 MB. Max. memory is 7.1 GB. [2018-10-03 08:39:37,738 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:39:37,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.16 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:39:37,739 INFO L168 Benchmark]: Boogie Preprocessor took 19.08 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:39:37,739 INFO L168 Benchmark]: RCFGBuilder took 282.79 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:39:37,739 INFO L168 Benchmark]: TraceAbstraction took 232513.88 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -136.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 309.3 MB). Peak memory consumption was 173.0 MB. Max. memory is 7.1 GB. [2018-10-03 08:39:37,741 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 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.16 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.08 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 282.79 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232513.88 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -136.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 309.3 MB). Peak memory consumption was 173.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 51 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 232.4s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 22.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 334 SDtfs, 0 SDslu, 4870 SDs, 0 SdLazy, 11196 SolverSat, 164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, 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, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 195.8s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 38610 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 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/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-39-37-753.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-39-37-753.csv Completed graceful shutdown