java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:40:41,590 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:40:41,592 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:40:41,608 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:40:41,608 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:40:41,609 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:40:41,611 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:40:41,614 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:40:41,615 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:40:41,618 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:40:41,620 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:40:41,653 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 09:40:41,667 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:40:41,667 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:40:41,668 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:40:41,668 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:40:41,669 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:40:41,669 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:40:41,669 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:40:41,670 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:40:41,670 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:40:41,670 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:40:41,670 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:40:41,671 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:40:41,671 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:40:41,671 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:40:41,671 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:40:41,671 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:40:41,671 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:40:41,672 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:40:41,672 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:40:41,672 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:40:41,672 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:40:41,672 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:40:41,673 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:40:41,673 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:40:41,673 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:40:41,673 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:40:41,673 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:40:41,674 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:40:41,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:40:41,674 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:40:41,674 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:40:41,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:40:41,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:40:41,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:40:41,750 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:40:41,751 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:40:41,751 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-10-04 09:40:41,751 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-10-04 09:40:41,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:40:41,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:40:41,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:40:41,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:40:41,799 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:40:41,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:40:41,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:40:41,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:40:41,841 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:40:41,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... [2018-10-04 09:40:41,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:40:41,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:40:41,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:40:41,861 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:40:41,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:40:41,930 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 09:40:41,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:40:41,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:40:42,183 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:40:42,183 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:40:42 BoogieIcfgContainer [2018-10-04 09:40:42,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:40:42,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:40:42,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:40:42,188 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:40:42,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:40:41" (1/2) ... [2018-10-04 09:40:42,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30624115 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:40:42, skipping insertion in model container [2018-10-04 09:40:42,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:40:42" (2/2) ... [2018-10-04 09:40:42,192 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-10-04 09:40:42,204 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:40:42,215 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:40:42,265 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:40:42,266 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:40:42,266 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:40:42,266 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:40:42,266 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:40:42,267 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:40:42,267 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:40:42,267 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:40:42,267 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:40:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-04 09:40:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:40:42,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:42,289 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:40:42,291 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:42,297 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-04 09:40:42,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:42,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:42,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:42,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:42,468 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:40:42,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:40:42,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:40:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:40:42,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:42,489 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-04 09:40:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:42,542 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-10-04 09:40:42,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:40:42,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:40:42,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:42,569 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:40:42,570 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:40:42,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:40:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:40:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-04 09:40:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:40:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-04 09:40:42,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-04 09:40:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:42,632 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-04 09:40:42,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:40:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-04 09:40:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:40:42,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:42,633 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 09:40:42,633 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:42,633 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-10-04 09:40:42,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:42,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:42,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:42,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:42,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:40:42,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:40:42,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:40:42,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:40:42,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:42,719 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-10-04 09:40:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:42,736 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-04 09:40:42,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:40:42,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 09:40:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:42,738 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:40:42,738 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:40:42,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:40:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:40:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:40:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:40:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-04 09:40:42,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-04 09:40:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:42,742 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-04 09:40:42,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:40:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-04 09:40:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:40:42,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:42,743 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 09:40:42,744 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:42,744 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-10-04 09:40:42,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:42,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:42,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:42,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:42,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:42,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:42,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:42,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:42,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:40:42,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:40:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:40:42,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:42,935 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-04 09:40:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:42,983 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-10-04 09:40:42,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:40:42,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:40:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:42,985 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:40:42,985 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:40:42,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 09:40:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:40:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:40:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:40:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-04 09:40:42,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-04 09:40:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:42,989 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-04 09:40:42,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:40:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-04 09:40:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:40:42,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:42,990 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-04 09:40:42,990 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:42,991 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-10-04 09:40:42,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:42,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:42,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:42,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-04 09:40:43,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:43,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:43,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:40:43,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:40:43,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:43,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:43,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:43,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-10-04 09:40:43,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:40:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:40:43,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:43,209 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-10-04 09:40:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:43,748 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-10-04 09:40:43,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:40:43,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 09:40:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:43,752 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:40:43,752 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:40:43,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 7 [2018-10-04 09:40:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:40:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-10-04 09:40:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:40:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 09:40:43,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-10-04 09:40:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:43,759 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 09:40:43,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:40:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 09:40:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:40:43,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:43,760 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-10-04 09:40:43,760 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:43,761 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-10-04 09:40:43,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:43,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:43,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:43,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:43,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-04 09:40:43,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:43,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:43,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:40:43,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:40:43,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:43,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-04 09:40:43,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:43,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:40:43,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:40:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:40:43,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:43,955 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-04 09:40:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:44,072 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-04 09:40:44,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:40:44,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-04 09:40:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:44,074 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:40:44,074 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:40:44,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 4 [2018-10-04 09:40:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:40:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:40:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:40:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 09:40:44,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-04 09:40:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:44,080 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 09:40:44,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:40:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 09:40:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:40:44,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:44,081 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-10-04 09:40:44,081 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:44,081 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-10-04 09:40:44,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:44,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:44,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:44,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:44,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-04 09:40:44,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:44,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:44,232 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:40:44,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:40:44,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:44,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-04 09:40:44,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:44,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-10-04 09:40:44,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:40:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:40:44,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:44,346 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-10-04 09:40:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:45,234 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-10-04 09:40:45,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:40:45,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-10-04 09:40:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:45,236 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:40:45,236 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:40:45,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 10 [2018-10-04 09:40:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:40:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-10-04 09:40:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:40:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-10-04 09:40:45,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-10-04 09:40:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:45,244 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-10-04 09:40:45,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:40:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-10-04 09:40:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:40:45,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:45,245 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-10-04 09:40:45,245 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:45,246 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:45,246 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-10-04 09:40:45,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:45,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:45,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:45,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:45,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-04 09:40:45,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:45,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:45,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:40:45,399 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:40:45,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:45,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-04 09:40:45,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:45,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-10-04 09:40:45,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:40:45,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:40:45,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:45,536 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-10-04 09:40:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:46,012 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-10-04 09:40:46,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:40:46,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-10-04 09:40:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:46,014 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:40:46,014 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:40:46,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 12 [2018-10-04 09:40:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:40:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-10-04 09:40:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:40:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-10-04 09:40:46,024 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-10-04 09:40:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:46,024 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-10-04 09:40:46,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:40:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-10-04 09:40:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:40:46,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:46,026 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-10-04 09:40:46,026 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:46,026 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:46,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-10-04 09:40:46,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:46,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:46,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:46,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:46,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-10-04 09:40:46,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:46,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:46,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:40:46,356 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:40:46,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:46,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-04 09:40:46,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:46,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:40:46,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:40:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:40:46,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:46,417 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-10-04 09:40:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:46,455 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-10-04 09:40:46,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:40:46,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-10-04 09:40:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:46,459 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:40:46,459 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:40:46,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 09:40:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:40:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:40:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:40:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-10-04 09:40:46,469 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-10-04 09:40:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:46,469 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-10-04 09:40:46,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:40:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-10-04 09:40:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:40:46,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:46,471 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-10-04 09:40:46,471 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:46,471 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-10-04 09:40:46,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:46,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:46,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:46,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:46,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-04 09:40:46,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:46,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:46,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:46,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-10-04 09:40:46,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:46,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-10-04 09:40:46,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:40:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:40:46,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:46,828 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-10-04 09:40:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:47,807 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-10-04 09:40:47,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:40:47,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-10-04 09:40:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:47,809 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:40:47,809 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:40:47,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 15 [2018-10-04 09:40:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:40:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-10-04 09:40:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:40:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-10-04 09:40:47,822 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-10-04 09:40:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:47,822 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-10-04 09:40:47,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:40:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-10-04 09:40:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:40:47,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:47,825 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-10-04 09:40:47,825 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:47,825 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-10-04 09:40:47,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:47,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:47,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:47,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:47,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-04 09:40:47,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:47,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:47,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:40:48,048 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:40:48,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:48,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-10-04 09:40:48,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:48,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-10-04 09:40:48,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:40:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:40:48,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:48,352 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-10-04 09:40:50,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:50,104 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-10-04 09:40:50,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:40:50,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-10-04 09:40:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:50,108 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:40:50,108 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:40:50,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 17 [2018-10-04 09:40:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:40:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-10-04 09:40:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:40:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-10-04 09:40:50,134 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-10-04 09:40:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:50,135 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-10-04 09:40:50,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:40:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-10-04 09:40:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:40:50,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:50,138 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-10-04 09:40:50,138 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:50,139 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-10-04 09:40:50,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:50,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:50,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:50,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:50,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-10-04 09:40:50,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:50,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:50,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:40:50,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:40:50,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:50,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-04 09:40:50,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:50,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-10-04 09:40:50,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:40:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:40:50,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:50,665 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-10-04 09:40:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:52,842 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-10-04 09:40:52,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:40:52,845 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-10-04 09:40:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:52,846 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:40:52,846 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:40:52,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 19 [2018-10-04 09:40:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:40:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-10-04 09:40:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:40:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-10-04 09:40:52,861 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-10-04 09:40:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:52,862 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-10-04 09:40:52,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:40:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-10-04 09:40:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:40:52,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:52,864 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-10-04 09:40:52,864 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:52,864 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-10-04 09:40:52,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:52,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:52,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:52,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:52,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-10-04 09:40:53,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:53,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:53,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:40:53,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:40:53,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:53,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-10-04 09:40:53,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:53,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:40:53,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:40:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:40:53,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:53,554 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-10-04 09:40:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:53,600 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-10-04 09:40:53,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:40:53,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-10-04 09:40:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:53,601 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:40:53,602 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:40:53,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 8 [2018-10-04 09:40:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:40:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-10-04 09:40:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:40:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-10-04 09:40:53,623 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-10-04 09:40:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:53,624 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-10-04 09:40:53,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:40:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-10-04 09:40:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:40:53,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:53,626 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-10-04 09:40:53,626 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:53,626 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-10-04 09:40:53,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:53,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:53,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:53,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:53,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 09:40:53,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:53,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:53,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:40:54,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:40:54,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:54,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 09:40:54,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:54,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:40:54,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:40:54,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:40:54,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:54,261 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-10-04 09:40:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:54,369 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-10-04 09:40:54,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:40:54,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-10-04 09:40:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:54,371 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:40:54,371 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 09:40:54,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 09:40:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 09:40:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-10-04 09:40:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:40:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-10-04 09:40:54,396 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-10-04 09:40:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:54,396 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-10-04 09:40:54,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:40:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-10-04 09:40:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:40:54,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:54,399 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-10-04 09:40:54,399 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:54,399 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-10-04 09:40:54,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:54,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:54,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:54,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:54,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-04 09:40:54,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:54,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:54,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:40:54,769 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-10-04 09:40:54,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:54,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-04 09:40:55,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:55,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:40:55,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:40:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:40:55,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:55,118 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-10-04 09:40:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:55,248 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-10-04 09:40:55,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:40:55,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-10-04 09:40:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:55,251 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:40:55,251 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 09:40:55,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 10 [2018-10-04 09:40:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 09:40:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-10-04 09:40:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 09:40:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-10-04 09:40:55,276 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-10-04 09:40:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:55,276 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-10-04 09:40:55,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:40:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-10-04 09:40:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:40:55,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:55,279 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-10-04 09:40:55,279 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:55,279 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-10-04 09:40:55,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:55,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:55,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:55,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:55,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 09:40:55,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:55,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:55,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:55,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 09:40:55,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:55,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:40:55,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:40:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:40:55,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:55,884 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-10-04 09:40:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:56,088 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-10-04 09:40:56,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:40:56,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-10-04 09:40:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:56,092 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:40:56,093 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:40:56,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 09:40:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:40:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-10-04 09:40:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:40:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-10-04 09:40:56,124 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-10-04 09:40:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:56,124 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-10-04 09:40:56,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:40:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-10-04 09:40:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 09:40:56,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:56,127 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-10-04 09:40:56,127 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:56,127 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-10-04 09:40:56,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:56,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:56,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:56,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:56,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-04 09:40:56,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:56,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:56,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:40:56,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:40:56,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:56,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-04 09:40:57,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:57,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:40:57,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:40:57,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:40:57,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:57,033 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-10-04 09:40:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:57,140 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-10-04 09:40:57,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:40:57,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-10-04 09:40:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:57,142 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:40:57,142 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 09:40:57,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 12 [2018-10-04 09:40:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 09:40:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-10-04 09:40:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 09:40:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-10-04 09:40:57,168 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-10-04 09:40:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:57,169 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-10-04 09:40:57,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:40:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-10-04 09:40:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:40:57,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:57,171 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-10-04 09:40:57,171 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:57,171 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-10-04 09:40:57,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:57,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:57,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:57,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:57,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 09:40:57,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:57,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:57,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:40:57,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-10-04 09:40:57,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:57,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 09:40:57,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:57,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:40:57,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:40:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:40:57,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:57,845 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-10-04 09:40:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:58,023 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-10-04 09:40:58,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:40:58,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-10-04 09:40:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:58,024 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:40:58,024 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:40:58,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 13 [2018-10-04 09:40:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:40:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-10-04 09:40:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:40:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-10-04 09:40:58,049 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-10-04 09:40:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:58,049 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-10-04 09:40:58,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:40:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-10-04 09:40:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-04 09:40:58,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:58,051 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-10-04 09:40:58,052 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:58,052 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-10-04 09:40:58,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:58,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:58,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:58,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-10-04 09:40:58,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:58,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:58,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:40:58,461 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:40:58,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:58,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-10-04 09:40:58,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:58,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:40:58,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:40:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:40:58,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:58,784 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-10-04 09:40:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:58,873 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-10-04 09:40:58,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:40:58,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-10-04 09:40:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:58,874 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:40:58,874 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 09:40:58,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 14 [2018-10-04 09:40:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 09:40:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-10-04 09:40:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-04 09:40:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-10-04 09:40:58,902 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-10-04 09:40:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:58,903 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-10-04 09:40:58,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:40:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-10-04 09:40:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-04 09:40:58,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:58,905 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-10-04 09:40:58,905 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:58,905 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-10-04 09:40:58,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:58,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:58,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:58,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:58,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 09:40:59,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:59,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:59,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:40:59,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-10-04 09:40:59,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:59,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 09:40:59,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:59,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:40:59,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:40:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:40:59,816 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:59,816 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-10-04 09:40:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:59,952 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-10-04 09:40:59,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:40:59,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-10-04 09:40:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:59,954 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:40:59,954 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 09:40:59,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 15 [2018-10-04 09:40:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 09:40:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-10-04 09:40:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-04 09:40:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-10-04 09:40:59,986 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-10-04 09:40:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:59,987 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-10-04 09:40:59,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:40:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-10-04 09:40:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-04 09:40:59,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:59,989 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-10-04 09:40:59,989 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:59,989 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-10-04 09:40:59,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:59,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:59,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:59,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:59,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-10-04 09:41:01,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:01,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:01,012 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:41:01,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-10-04 09:41:01,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:01,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-10-04 09:41:02,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:02,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:41:02,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:41:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:41:02,229 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:02,229 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-10-04 09:41:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:02,327 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-10-04 09:41:02,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:41:02,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-10-04 09:41:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:02,329 INFO L225 Difference]: With dead ends: 209 [2018-10-04 09:41:02,329 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 09:41:02,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 16 [2018-10-04 09:41:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 09:41:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-10-04 09:41:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 09:41:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-10-04 09:41:02,368 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-10-04 09:41:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:02,368 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-10-04 09:41:02,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:41:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-10-04 09:41:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-04 09:41:02,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:02,370 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-10-04 09:41:02,370 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:02,370 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:02,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-10-04 09:41:02,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:02,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:02,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:02,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:02,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 09:41:03,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:03,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:03,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:03,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 09:41:03,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:03,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:41:03,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:41:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:41:03,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:03,653 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-10-04 09:41:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:03,781 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-10-04 09:41:03,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:41:03,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-10-04 09:41:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:03,782 INFO L225 Difference]: With dead ends: 221 [2018-10-04 09:41:03,782 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:41:03,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 17 [2018-10-04 09:41:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:41:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-10-04 09:41:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-04 09:41:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-10-04 09:41:03,823 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-10-04 09:41:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:03,824 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-10-04 09:41:03,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:41:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-10-04 09:41:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-04 09:41:03,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:03,825 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-10-04 09:41:03,825 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:03,826 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-10-04 09:41:03,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:03,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:03,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-10-04 09:41:04,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:04,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:04,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:41:04,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:41:04,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:04,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-10-04 09:41:05,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:05,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:41:05,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:41:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:41:05,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:05,042 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-10-04 09:41:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:05,190 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-10-04 09:41:05,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:41:05,191 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-10-04 09:41:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:05,193 INFO L225 Difference]: With dead ends: 233 [2018-10-04 09:41:05,193 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 09:41:05,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 18 [2018-10-04 09:41:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 09:41:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-10-04 09:41:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-04 09:41:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-10-04 09:41:05,237 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-10-04 09:41:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:05,238 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-10-04 09:41:05,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:41:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-10-04 09:41:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-04 09:41:05,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:05,239 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-10-04 09:41:05,239 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:05,239 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-10-04 09:41:05,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:05,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:05,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:05,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:06,038 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:41:06,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:06,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:06,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:41:06,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-10-04 09:41:06,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:06,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:41:06,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:06,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:41:06,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:41:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:41:06,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:06,888 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-10-04 09:41:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:07,039 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-10-04 09:41:07,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:41:07,040 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-10-04 09:41:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:07,041 INFO L225 Difference]: With dead ends: 245 [2018-10-04 09:41:07,041 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 09:41:07,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.4s impTime 6 [2018-10-04 09:41:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 09:41:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-10-04 09:41:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-04 09:41:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-10-04 09:41:07,096 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-10-04 09:41:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:07,097 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-10-04 09:41:07,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:41:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-10-04 09:41:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-04 09:41:07,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:07,099 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-10-04 09:41:07,099 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:07,099 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-10-04 09:41:07,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:07,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:07,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:07,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:07,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:08,150 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-10-04 09:41:08,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:08,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:08,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:41:08,354 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:41:08,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:08,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-10-04 09:41:08,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:08,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:41:08,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:41:08,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:41:08,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:08,752 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-10-04 09:41:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:08,907 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-10-04 09:41:08,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:41:08,912 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-10-04 09:41:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:08,914 INFO L225 Difference]: With dead ends: 257 [2018-10-04 09:41:08,914 INFO L226 Difference]: Without dead ends: 255 [2018-10-04 09:41:08,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 7 [2018-10-04 09:41:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-04 09:41:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-10-04 09:41:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-04 09:41:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-10-04 09:41:08,982 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-10-04 09:41:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:08,983 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-10-04 09:41:08,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:41:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-10-04 09:41:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-04 09:41:08,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:08,984 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-10-04 09:41:08,985 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:08,985 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-10-04 09:41:08,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:08,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:08,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:08,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:08,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:09,267 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-10-04 09:41:09,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:09,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:09,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:41:09,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-10-04 09:41:09,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:09,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-10-04 09:41:10,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:10,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:41:10,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:41:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:41:10,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:10,101 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-10-04 09:41:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:10,274 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-10-04 09:41:10,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:41:10,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-10-04 09:41:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:10,275 INFO L225 Difference]: With dead ends: 269 [2018-10-04 09:41:10,276 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 09:41:10,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 8 [2018-10-04 09:41:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 09:41:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-10-04 09:41:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-04 09:41:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-10-04 09:41:10,334 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-10-04 09:41:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:10,335 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-10-04 09:41:10,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:41:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-10-04 09:41:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-04 09:41:10,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:10,336 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-10-04 09:41:10,337 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:10,337 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-10-04 09:41:10,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:10,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:10,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:10,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:10,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:10,716 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-10-04 09:41:10,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:10,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:10,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:41:11,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-10-04 09:41:11,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:11,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-10-04 09:41:11,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:11,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:41:11,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:41:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:41:11,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:11,683 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-10-04 09:41:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:12,248 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-10-04 09:41:12,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:41:12,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-10-04 09:41:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:12,251 INFO L225 Difference]: With dead ends: 281 [2018-10-04 09:41:12,251 INFO L226 Difference]: Without dead ends: 279 [2018-10-04 09:41:12,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 9 [2018-10-04 09:41:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-04 09:41:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-10-04 09:41:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-04 09:41:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-10-04 09:41:12,320 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-10-04 09:41:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:12,320 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-10-04 09:41:12,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:41:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-10-04 09:41:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-04 09:41:12,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:12,322 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-10-04 09:41:12,323 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:12,323 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-10-04 09:41:12,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:12,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:12,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:12,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:12,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:13,063 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-10-04 09:41:13,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:13,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:13,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:13,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-10-04 09:41:15,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:15,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:41:15,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:41:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:41:15,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:15,004 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-10-04 09:41:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:15,174 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-10-04 09:41:15,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:41:15,175 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-10-04 09:41:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:15,176 INFO L225 Difference]: With dead ends: 293 [2018-10-04 09:41:15,177 INFO L226 Difference]: Without dead ends: 291 [2018-10-04 09:41:15,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 0.5s impTime 10 [2018-10-04 09:41:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-04 09:41:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-10-04 09:41:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-04 09:41:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-10-04 09:41:15,271 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-10-04 09:41:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:15,271 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-10-04 09:41:15,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:41:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-10-04 09:41:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-04 09:41:15,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:15,273 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-10-04 09:41:15,274 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:15,274 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-10-04 09:41:15,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:15,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:15,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:15,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:15,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:15,899 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-10-04 09:41:16,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:16,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:16,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:41:16,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:41:16,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:16,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-10-04 09:41:17,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:17,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:41:17,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:41:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:41:17,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:17,402 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-10-04 09:41:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:17,716 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-10-04 09:41:17,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:41:17,717 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-10-04 09:41:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:17,719 INFO L225 Difference]: With dead ends: 305 [2018-10-04 09:41:17,719 INFO L226 Difference]: Without dead ends: 303 [2018-10-04 09:41:17,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.4s impTime 11 [2018-10-04 09:41:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-04 09:41:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-10-04 09:41:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-04 09:41:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-10-04 09:41:17,800 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-10-04 09:41:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:17,800 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-10-04 09:41:17,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:41:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-10-04 09:41:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-04 09:41:17,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:17,802 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-10-04 09:41:17,802 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:17,802 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-10-04 09:41:17,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:17,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:17,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:17,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:17,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:18,700 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 09:41:18,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:18,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:18,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:41:19,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-10-04 09:41:19,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:19,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 09:41:20,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:20,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:41:20,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:41:20,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:41:20,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:20,142 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-10-04 09:41:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:20,343 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-10-04 09:41:20,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:41:20,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-10-04 09:41:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:20,345 INFO L225 Difference]: With dead ends: 317 [2018-10-04 09:41:20,345 INFO L226 Difference]: Without dead ends: 315 [2018-10-04 09:41:20,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.6s impTime 12 [2018-10-04 09:41:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-04 09:41:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-10-04 09:41:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-04 09:41:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-10-04 09:41:20,462 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-10-04 09:41:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:20,463 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-10-04 09:41:20,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:41:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-10-04 09:41:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-04 09:41:20,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:20,465 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-10-04 09:41:20,465 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:20,465 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-10-04 09:41:20,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:20,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:20,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:20,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:20,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:21,192 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-10-04 09:41:21,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:21,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:21,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:41:21,575 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:41:21,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:21,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-10-04 09:41:22,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:22,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:41:22,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:41:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:41:22,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:22,394 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-10-04 09:41:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:22,612 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-10-04 09:41:22,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:41:22,613 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-10-04 09:41:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:22,614 INFO L225 Difference]: With dead ends: 329 [2018-10-04 09:41:22,614 INFO L226 Difference]: Without dead ends: 327 [2018-10-04 09:41:22,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.5s impTime 13 [2018-10-04 09:41:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-04 09:41:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-10-04 09:41:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-04 09:41:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-10-04 09:41:22,707 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-10-04 09:41:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:22,708 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-10-04 09:41:22,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:41:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-10-04 09:41:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-04 09:41:22,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:22,710 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-10-04 09:41:22,710 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:22,710 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-10-04 09:41:22,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:22,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:22,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:22,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:22,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:23,139 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 09:41:23,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:23,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:23,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:41:23,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-10-04 09:41:23,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:23,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 09:41:24,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:24,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:41:24,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:41:24,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:41:24,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:24,412 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-10-04 09:41:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:24,651 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-10-04 09:41:24,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:41:24,651 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-10-04 09:41:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:24,652 INFO L225 Difference]: With dead ends: 341 [2018-10-04 09:41:24,653 INFO L226 Difference]: Without dead ends: 339 [2018-10-04 09:41:24,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 14 [2018-10-04 09:41:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-04 09:41:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-10-04 09:41:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-04 09:41:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-10-04 09:41:24,749 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-10-04 09:41:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:24,749 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-10-04 09:41:24,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:41:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-10-04 09:41:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-04 09:41:24,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:24,751 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-10-04 09:41:24,751 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:24,751 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-10-04 09:41:24,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:24,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:24,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:25,637 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-10-04 09:41:25,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:25,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:25,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:41:26,380 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-10-04 09:41:26,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:26,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-10-04 09:41:26,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:26,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:41:26,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:41:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:41:26,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:26,980 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-10-04 09:41:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:27,269 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-10-04 09:41:27,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:41:27,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-10-04 09:41:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:27,271 INFO L225 Difference]: With dead ends: 353 [2018-10-04 09:41:27,271 INFO L226 Difference]: Without dead ends: 351 [2018-10-04 09:41:27,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.7s impTime 15 [2018-10-04 09:41:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-04 09:41:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-10-04 09:41:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-04 09:41:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-10-04 09:41:27,376 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-10-04 09:41:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:27,377 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-10-04 09:41:27,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:41:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-10-04 09:41:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-04 09:41:27,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:27,378 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-10-04 09:41:27,379 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:27,379 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-10-04 09:41:27,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:27,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:27,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:27,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:27,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:27,727 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-04 09:41:28,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:28,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:28,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:28,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-04 09:41:28,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:28,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:41:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:41:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:41:28,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:28,832 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-10-04 09:41:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:29,121 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-10-04 09:41:29,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:41:29,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-10-04 09:41:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:29,123 INFO L225 Difference]: With dead ends: 365 [2018-10-04 09:41:29,123 INFO L226 Difference]: Without dead ends: 363 [2018-10-04 09:41:29,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 16 [2018-10-04 09:41:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-04 09:41:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-10-04 09:41:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-04 09:41:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-10-04 09:41:29,241 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-10-04 09:41:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:29,241 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-10-04 09:41:29,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:41:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-10-04 09:41:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-04 09:41:29,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:29,244 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-10-04 09:41:29,244 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:29,244 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-10-04 09:41:29,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:29,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:29,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:29,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:29,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:29,638 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-10-04 09:41:29,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:29,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:29,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:41:30,026 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:41:30,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:30,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-10-04 09:41:30,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:30,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:41:30,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:41:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:41:30,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:30,741 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-10-04 09:41:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:30,987 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-10-04 09:41:30,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:41:30,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-10-04 09:41:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:30,989 INFO L225 Difference]: With dead ends: 377 [2018-10-04 09:41:30,989 INFO L226 Difference]: Without dead ends: 375 [2018-10-04 09:41:30,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 17 [2018-10-04 09:41:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-04 09:41:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-10-04 09:41:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-04 09:41:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-10-04 09:41:31,114 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-10-04 09:41:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:31,115 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-10-04 09:41:31,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:41:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-10-04 09:41:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-04 09:41:31,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:31,117 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-10-04 09:41:31,117 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:31,118 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-10-04 09:41:31,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:31,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:31,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:31,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:31,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:31,705 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-04 09:41:31,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:31,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:31,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:41:32,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-10-04 09:41:32,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:32,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-04 09:41:33,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:33,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:41:33,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:41:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:41:33,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:33,235 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-10-04 09:41:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:33,494 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-10-04 09:41:33,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:41:33,494 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-10-04 09:41:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:33,496 INFO L225 Difference]: With dead ends: 389 [2018-10-04 09:41:33,496 INFO L226 Difference]: Without dead ends: 387 [2018-10-04 09:41:33,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.4s impTime 18 [2018-10-04 09:41:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-04 09:41:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-10-04 09:41:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-04 09:41:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-10-04 09:41:33,621 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-10-04 09:41:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:33,621 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-10-04 09:41:33,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:41:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-10-04 09:41:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-04 09:41:33,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:33,623 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-10-04 09:41:33,623 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:33,623 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-10-04 09:41:33,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:33,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:33,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:33,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:33,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:33,986 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-10-04 09:41:34,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:34,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:34,418 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:41:34,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:41:34,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:34,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-10-04 09:41:35,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:35,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:41:35,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:41:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:41:35,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:35,279 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-10-04 09:41:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:35,639 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-10-04 09:41:35,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:41:35,639 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-10-04 09:41:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:35,641 INFO L225 Difference]: With dead ends: 401 [2018-10-04 09:41:35,641 INFO L226 Difference]: Without dead ends: 399 [2018-10-04 09:41:35,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime 19 [2018-10-04 09:41:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-04 09:41:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-10-04 09:41:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-04 09:41:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-10-04 09:41:35,786 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-10-04 09:41:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:35,786 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-10-04 09:41:35,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:41:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-10-04 09:41:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-04 09:41:35,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:35,789 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-10-04 09:41:35,789 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:35,789 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-10-04 09:41:35,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:35,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:35,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:35,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:35,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:36,242 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-04 09:41:36,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:36,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:36,701 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:41:37,322 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-10-04 09:41:37,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:37,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-04 09:41:38,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:38,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:41:38,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:41:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:41:38,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:38,243 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-10-04 09:41:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:38,564 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-10-04 09:41:38,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:41:38,565 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-10-04 09:41:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:38,566 INFO L225 Difference]: With dead ends: 413 [2018-10-04 09:41:38,567 INFO L226 Difference]: Without dead ends: 411 [2018-10-04 09:41:38,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.5s impTime 20 [2018-10-04 09:41:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-10-04 09:41:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-10-04 09:41:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-04 09:41:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-10-04 09:41:38,713 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-10-04 09:41:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:38,714 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-10-04 09:41:38,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:41:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-10-04 09:41:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-04 09:41:38,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:38,717 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-10-04 09:41:38,717 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:38,717 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-10-04 09:41:38,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:38,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:38,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:38,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:38,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:39,138 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-10-04 09:41:39,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:39,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:39,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:41:40,105 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-10-04 09:41:40,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:40,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-10-04 09:41:40,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:40,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:41:40,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:41:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:41:40,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:40,851 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-10-04 09:41:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:41,216 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-10-04 09:41:41,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:41:41,217 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-10-04 09:41:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:41,218 INFO L225 Difference]: With dead ends: 425 [2018-10-04 09:41:41,218 INFO L226 Difference]: Without dead ends: 423 [2018-10-04 09:41:41,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 21 [2018-10-04 09:41:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-04 09:41:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-10-04 09:41:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-04 09:41:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-10-04 09:41:41,383 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-10-04 09:41:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:41,383 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-10-04 09:41:41,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:41:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-10-04 09:41:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-04 09:41:41,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:41,386 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-10-04 09:41:41,386 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:41,386 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:41,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-10-04 09:41:41,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:41,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:41,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:41,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:41,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:41,855 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:42,034 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:41:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-10-04 09:41:42,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:42,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:42,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:42,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-10-04 09:41:43,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:43,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:41:43,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:41:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:41:43,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:43,380 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-10-04 09:41:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:43,822 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-10-04 09:41:43,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:41:43,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-10-04 09:41:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:43,824 INFO L225 Difference]: With dead ends: 437 [2018-10-04 09:41:43,824 INFO L226 Difference]: Without dead ends: 435 [2018-10-04 09:41:43,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.3s impTime 7 [2018-10-04 09:41:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-10-04 09:41:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-10-04 09:41:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-04 09:41:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-10-04 09:41:43,967 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-10-04 09:41:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:43,967 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-10-04 09:41:43,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:41:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-10-04 09:41:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-04 09:41:43,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:43,970 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-10-04 09:41:43,970 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:43,970 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-10-04 09:41:43,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:43,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:43,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:41:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:44,372 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:44,736 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:41:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-10-04 09:41:44,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:44,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:44,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:41:45,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:41:45,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:45,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-10-04 09:41:46,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:46,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:41:46,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:41:46,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:41:46,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:46,875 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-10-04 09:41:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:47,225 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-10-04 09:41:47,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:41:47,226 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-10-04 09:41:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:47,227 INFO L225 Difference]: With dead ends: 449 [2018-10-04 09:41:47,227 INFO L226 Difference]: Without dead ends: 447 [2018-10-04 09:41:47,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 0.5s impTime 8 [2018-10-04 09:41:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-10-04 09:41:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-10-04 09:41:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-04 09:41:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-10-04 09:41:47,393 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-10-04 09:41:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:47,394 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-10-04 09:41:47,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:41:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-10-04 09:41:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-04 09:41:47,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:47,396 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-10-04 09:41:47,397 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:47,397 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-10-04 09:41:47,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:47,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:47,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:47,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:47,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:47,865 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:48,255 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:41:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-04 09:41:48,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:48,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:48,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:41:49,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-10-04 09:41:49,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:49,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-04 09:41:50,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:50,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:41:50,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:41:50,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:41:50,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:50,108 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-10-04 09:41:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:50,481 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-10-04 09:41:50,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:41:50,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-10-04 09:41:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:50,483 INFO L225 Difference]: With dead ends: 461 [2018-10-04 09:41:50,483 INFO L226 Difference]: Without dead ends: 459 [2018-10-04 09:41:50,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.6s impTime 9 [2018-10-04 09:41:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-10-04 09:41:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-10-04 09:41:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-04 09:41:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-10-04 09:41:50,660 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-10-04 09:41:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:50,660 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-10-04 09:41:50,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:41:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-10-04 09:41:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-04 09:41:50,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:50,662 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-10-04 09:41:50,662 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:50,663 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-10-04 09:41:50,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:50,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:50,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:50,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:50,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:51,364 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:51,608 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:41:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-10-04 09:41:51,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:51,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:51,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:41:52,115 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:41:52,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:52,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-10-04 09:41:52,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:52,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:41:52,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:41:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:41:52,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:52,899 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-10-04 09:41:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:53,293 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-10-04 09:41:53,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:41:53,294 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-10-04 09:41:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:53,295 INFO L225 Difference]: With dead ends: 473 [2018-10-04 09:41:53,295 INFO L226 Difference]: Without dead ends: 471 [2018-10-04 09:41:53,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.5s impTime 8 [2018-10-04 09:41:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-10-04 09:41:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-10-04 09:41:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-04 09:41:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-10-04 09:41:53,500 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-10-04 09:41:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:53,500 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-10-04 09:41:53,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:41:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-10-04 09:41:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-04 09:41:53,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:53,503 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-10-04 09:41:53,503 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:53,503 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-10-04 09:41:53,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:53,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:53,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:53,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:53,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:53,944 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:54,182 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:41:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-10-04 09:41:54,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:54,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:54,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:41:55,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-10-04 09:41:55,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:55,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-10-04 09:41:56,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:56,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:41:56,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:41:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:41:56,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:56,052 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-10-04 09:41:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:41:56,609 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-10-04 09:41:56,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:41:56,609 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-10-04 09:41:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:41:56,611 INFO L225 Difference]: With dead ends: 485 [2018-10-04 09:41:56,611 INFO L226 Difference]: Without dead ends: 483 [2018-10-04 09:41:56,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.4s impTime 11 [2018-10-04 09:41:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-10-04 09:41:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-10-04 09:41:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-10-04 09:41:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-10-04 09:41:56,799 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-10-04 09:41:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:41:56,800 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-10-04 09:41:56,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:41:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-10-04 09:41:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-10-04 09:41:56,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:41:56,802 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-10-04 09:41:56,802 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:41:56,802 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:41:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-10-04 09:41:56,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:41:56,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:41:56,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:56,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:41:56,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:41:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:41:57,735 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:41:57,914 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:41:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-04 09:41:58,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:41:58,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:41:58,295 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:41:59,120 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-10-04 09:41:59,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:41:59,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:41:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-04 09:41:59,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:41:59,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:41:59,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:41:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:41:59,947 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:41:59,947 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-10-04 09:42:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:00,427 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-10-04 09:42:00,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:42:00,435 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-10-04 09:42:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:00,437 INFO L225 Difference]: With dead ends: 497 [2018-10-04 09:42:00,437 INFO L226 Difference]: Without dead ends: 495 [2018-10-04 09:42:00,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.8s impTime 12 [2018-10-04 09:42:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-10-04 09:42:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-10-04 09:42:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-04 09:42:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-10-04 09:42:00,644 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-10-04 09:42:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:00,644 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-10-04 09:42:00,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:42:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-10-04 09:42:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-10-04 09:42:00,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:00,646 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-10-04 09:42:00,647 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:00,647 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-10-04 09:42:00,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:00,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:00,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:00,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:00,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:01,111 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:01,346 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-10-04 09:42:01,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:01,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:01,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:42:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:01,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-10-04 09:42:02,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:02,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:42:02,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:42:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:42:02,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:02,736 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-10-04 09:42:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:03,176 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-10-04 09:42:03,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:42:03,176 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-10-04 09:42:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:03,178 INFO L225 Difference]: With dead ends: 509 [2018-10-04 09:42:03,178 INFO L226 Difference]: Without dead ends: 507 [2018-10-04 09:42:03,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.4s impTime 13 [2018-10-04 09:42:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-10-04 09:42:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-10-04 09:42:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-10-04 09:42:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-10-04 09:42:03,397 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-10-04 09:42:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:03,397 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-10-04 09:42:03,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:42:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-10-04 09:42:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-10-04 09:42:03,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:03,400 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-10-04 09:42:03,400 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:03,400 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-10-04 09:42:03,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:03,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:03,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:03,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:42:03,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:03,632 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:03,804 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-10-04 09:42:04,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:04,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:04,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:42:04,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:42:04,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:04,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-10-04 09:42:05,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:05,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:42:05,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:42:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:42:05,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:05,282 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-10-04 09:42:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:05,718 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-10-04 09:42:05,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:42:05,718 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-10-04 09:42:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:05,720 INFO L225 Difference]: With dead ends: 521 [2018-10-04 09:42:05,720 INFO L226 Difference]: Without dead ends: 519 [2018-10-04 09:42:05,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 14 [2018-10-04 09:42:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-10-04 09:42:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-10-04 09:42:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-10-04 09:42:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-10-04 09:42:05,945 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-10-04 09:42:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:05,946 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-10-04 09:42:05,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:42:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-10-04 09:42:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-10-04 09:42:05,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:05,948 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-10-04 09:42:05,948 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:05,948 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:05,948 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-10-04 09:42:05,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:05,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:05,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:05,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:05,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:06,223 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:06,452 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-10-04 09:42:06,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:06,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:06,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:42:07,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-10-04 09:42:07,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:07,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-10-04 09:42:09,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:09,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:42:09,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:42:09,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:42:09,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:09,091 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-10-04 09:42:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:09,735 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-10-04 09:42:09,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:42:09,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-10-04 09:42:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:09,745 INFO L225 Difference]: With dead ends: 533 [2018-10-04 09:42:09,746 INFO L226 Difference]: Without dead ends: 531 [2018-10-04 09:42:09,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.4s impTime 15 [2018-10-04 09:42:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-10-04 09:42:10,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-10-04 09:42:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-10-04 09:42:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-10-04 09:42:10,020 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-10-04 09:42:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:10,020 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-10-04 09:42:10,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:42:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-10-04 09:42:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-10-04 09:42:10,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:10,022 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-10-04 09:42:10,023 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:10,023 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:10,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-10-04 09:42:10,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:10,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:10,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:10,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:10,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:10,267 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:10,710 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-10-04 09:42:11,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:11,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:11,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:42:11,555 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:42:11,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:11,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-10-04 09:42:12,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:12,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:42:12,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:42:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:42:12,488 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:12,488 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-10-04 09:42:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:13,091 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-10-04 09:42:13,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:42:13,092 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-10-04 09:42:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:13,094 INFO L225 Difference]: With dead ends: 545 [2018-10-04 09:42:13,095 INFO L226 Difference]: Without dead ends: 543 [2018-10-04 09:42:13,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.5s impTime 14 [2018-10-04 09:42:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-10-04 09:42:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-10-04 09:42:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-10-04 09:42:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-10-04 09:42:13,389 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-10-04 09:42:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:13,389 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-10-04 09:42:13,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:42:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-10-04 09:42:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-10-04 09:42:13,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:13,392 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-10-04 09:42:13,392 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:13,392 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-10-04 09:42:13,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:13,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:13,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:13,724 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:13,944 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-10-04 09:42:14,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:14,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:14,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:42:15,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-10-04 09:42:15,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:15,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-10-04 09:42:16,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:16,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:42:16,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:42:16,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:42:16,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:16,372 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-10-04 09:42:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:17,011 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-10-04 09:42:17,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:42:17,012 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-10-04 09:42:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:17,014 INFO L225 Difference]: With dead ends: 557 [2018-10-04 09:42:17,014 INFO L226 Difference]: Without dead ends: 555 [2018-10-04 09:42:17,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.4s impTime 17 [2018-10-04 09:42:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-10-04 09:42:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-10-04 09:42:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-10-04 09:42:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-10-04 09:42:17,301 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-10-04 09:42:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:17,302 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-10-04 09:42:17,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:42:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-10-04 09:42:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-10-04 09:42:17,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:17,304 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-10-04 09:42:17,305 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:17,305 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-10-04 09:42:17,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:17,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:17,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:17,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:17,551 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:17,780 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-04 09:42:18,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:18,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:18,230 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:42:19,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-10-04 09:42:19,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:19,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-04 09:42:20,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:20,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:42:20,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:42:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:42:20,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:20,373 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-10-04 09:42:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:20,899 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-10-04 09:42:20,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:42:20,899 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-10-04 09:42:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:20,901 INFO L225 Difference]: With dead ends: 569 [2018-10-04 09:42:20,901 INFO L226 Difference]: Without dead ends: 567 [2018-10-04 09:42:20,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.4s impTime 16 [2018-10-04 09:42:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-10-04 09:42:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-10-04 09:42:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-10-04 09:42:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-10-04 09:42:21,155 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-10-04 09:42:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:21,155 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-10-04 09:42:21,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:42:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-10-04 09:42:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-10-04 09:42:21,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:21,158 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-10-04 09:42:21,158 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:21,158 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-10-04 09:42:21,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:21,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:21,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:21,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:21,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:21,389 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:21,506 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-10-04 09:42:21,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:21,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:21,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:42:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:22,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-10-04 09:42:23,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:23,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:42:23,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:42:23,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:42:23,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:23,230 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-10-04 09:42:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:23,776 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-10-04 09:42:23,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:42:23,776 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-10-04 09:42:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:23,778 INFO L225 Difference]: With dead ends: 581 [2018-10-04 09:42:23,778 INFO L226 Difference]: Without dead ends: 579 [2018-10-04 09:42:23,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.2s impTime 19 [2018-10-04 09:42:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-10-04 09:42:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-10-04 09:42:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-10-04 09:42:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-10-04 09:42:24,054 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-10-04 09:42:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:24,054 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-10-04 09:42:24,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:42:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-10-04 09:42:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-10-04 09:42:24,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:24,058 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-10-04 09:42:24,058 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:24,058 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-10-04 09:42:24,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:24,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:24,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:42:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:24,308 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:24,445 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-10-04 09:42:24,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:24,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:24,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:42:25,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:42:25,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:25,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-10-04 09:42:26,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:26,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:42:26,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:42:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:42:26,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:26,197 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-10-04 09:42:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:26,760 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-10-04 09:42:26,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:42:26,760 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-10-04 09:42:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:26,762 INFO L225 Difference]: With dead ends: 593 [2018-10-04 09:42:26,763 INFO L226 Difference]: Without dead ends: 591 [2018-10-04 09:42:26,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 20 [2018-10-04 09:42:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-04 09:42:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-10-04 09:42:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-10-04 09:42:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-10-04 09:42:27,061 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-10-04 09:42:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:27,062 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-10-04 09:42:27,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:42:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-10-04 09:42:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-10-04 09:42:27,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:27,064 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-10-04 09:42:27,064 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:27,065 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-10-04 09:42:27,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:27,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:27,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:27,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:27,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:27,364 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:27,598 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-10-04 09:42:28,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:28,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:28,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:42:29,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-10-04 09:42:29,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:29,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-10-04 09:42:30,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:30,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:42:30,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:42:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:42:30,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:30,526 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-10-04 09:42:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:31,201 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-10-04 09:42:31,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:42:31,201 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-10-04 09:42:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:31,203 INFO L225 Difference]: With dead ends: 605 [2018-10-04 09:42:31,203 INFO L226 Difference]: Without dead ends: 603 [2018-10-04 09:42:31,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.5s impTime 21 [2018-10-04 09:42:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-10-04 09:42:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-10-04 09:42:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-10-04 09:42:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-10-04 09:42:31,497 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-10-04 09:42:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:31,497 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-10-04 09:42:31,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:42:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-10-04 09:42:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-10-04 09:42:31,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:31,500 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-10-04 09:42:31,500 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:31,500 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-10-04 09:42:31,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:31,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:31,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:31,748 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:31,986 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:32,311 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-10-04 09:42:32,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:32,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:32,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:42:32,926 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:42:32,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:32,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-10-04 09:42:34,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:34,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:42:34,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:42:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:42:34,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:34,035 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-10-04 09:42:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:34,687 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-10-04 09:42:34,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:42:34,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-10-04 09:42:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:34,689 INFO L225 Difference]: With dead ends: 617 [2018-10-04 09:42:34,689 INFO L226 Difference]: Without dead ends: 615 [2018-10-04 09:42:34,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.5s impTime 7 [2018-10-04 09:42:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-10-04 09:42:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-10-04 09:42:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-10-04 09:42:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-10-04 09:42:35,003 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-10-04 09:42:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:35,003 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-10-04 09:42:35,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:42:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-10-04 09:42:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-10-04 09:42:35,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:35,006 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-10-04 09:42:35,006 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:35,006 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-10-04 09:42:35,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:35,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:35,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:35,278 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:35,396 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:35,588 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-10-04 09:42:35,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:35,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:35,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:42:37,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-10-04 09:42:37,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:37,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-10-04 09:42:38,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:38,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:42:38,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:42:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:42:38,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:38,554 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-10-04 09:42:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:39,223 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-10-04 09:42:39,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:42:39,223 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-10-04 09:42:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:39,225 INFO L225 Difference]: With dead ends: 629 [2018-10-04 09:42:39,225 INFO L226 Difference]: Without dead ends: 627 [2018-10-04 09:42:39,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.3s impTime 8 [2018-10-04 09:42:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-10-04 09:42:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-10-04 09:42:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-10-04 09:42:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-10-04 09:42:39,563 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-10-04 09:42:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:39,564 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-10-04 09:42:39,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:42:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-10-04 09:42:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-10-04 09:42:39,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:39,567 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-10-04 09:42:39,567 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:39,567 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-10-04 09:42:39,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:39,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:39,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:39,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:39,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:39,836 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:39,988 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:40,250 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-10-04 09:42:40,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:40,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:40,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:42:41,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-10-04 09:42:41,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:41,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-10-04 09:42:43,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:43,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:42:43,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:42:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:42:43,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:43,072 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-10-04 09:42:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:43,731 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-10-04 09:42:43,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:42:43,731 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-10-04 09:42:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:43,733 INFO L225 Difference]: With dead ends: 641 [2018-10-04 09:42:43,733 INFO L226 Difference]: Without dead ends: 639 [2018-10-04 09:42:43,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.3s impTime 7 [2018-10-04 09:42:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-04 09:42:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-10-04 09:42:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-10-04 09:42:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-10-04 09:42:44,093 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-10-04 09:42:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:44,093 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-10-04 09:42:44,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:42:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-10-04 09:42:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-10-04 09:42:44,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:44,097 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-10-04 09:42:44,097 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:44,097 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-10-04 09:42:44,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:44,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:44,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:44,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:44,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:44,427 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:44,653 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:44,863 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-10-04 09:42:45,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:45,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:45,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:42:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:45,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-10-04 09:42:46,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:46,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:42:46,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:42:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:42:46,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:46,763 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-10-04 09:42:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:47,407 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-10-04 09:42:47,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:42:47,408 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-10-04 09:42:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:47,410 INFO L225 Difference]: With dead ends: 653 [2018-10-04 09:42:47,410 INFO L226 Difference]: Without dead ends: 651 [2018-10-04 09:42:47,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.4s impTime 10 [2018-10-04 09:42:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-10-04 09:42:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-10-04 09:42:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-10-04 09:42:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-10-04 09:42:47,786 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-10-04 09:42:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:47,787 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-10-04 09:42:47,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:42:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-10-04 09:42:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-04 09:42:47,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:47,791 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-10-04 09:42:47,791 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:47,791 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-10-04 09:42:47,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:47,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:47,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:47,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:42:47,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:48,048 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:48,262 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:48,426 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-10-04 09:42:48,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:48,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:48,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:42:49,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:42:49,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:49,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-10-04 09:42:50,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:50,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:42:50,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:42:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:42:50,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:50,572 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-10-04 09:42:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:51,280 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-10-04 09:42:51,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:42:51,280 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-10-04 09:42:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:51,283 INFO L225 Difference]: With dead ends: 665 [2018-10-04 09:42:51,283 INFO L226 Difference]: Without dead ends: 663 [2018-10-04 09:42:51,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.4s impTime 11 [2018-10-04 09:42:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-10-04 09:42:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-10-04 09:42:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-10-04 09:42:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-10-04 09:42:51,665 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-10-04 09:42:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:51,666 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-10-04 09:42:51,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:42:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-10-04 09:42:51,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-10-04 09:42:51,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:51,669 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-10-04 09:42:51,669 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:51,669 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:51,669 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-10-04 09:42:51,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:51,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:51,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:51,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:51,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:51,943 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:52,179 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:52,514 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-04 09:42:52,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:52,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:52,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:42:54,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-10-04 09:42:54,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:54,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-04 09:42:55,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:55,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:42:55,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:42:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:42:55,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:55,946 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-10-04 09:42:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:42:56,674 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-10-04 09:42:56,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:42:56,675 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-10-04 09:42:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:42:56,677 INFO L225 Difference]: With dead ends: 677 [2018-10-04 09:42:56,677 INFO L226 Difference]: Without dead ends: 675 [2018-10-04 09:42:56,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.6s impTime 12 [2018-10-04 09:42:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-10-04 09:42:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-10-04 09:42:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-10-04 09:42:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-10-04 09:42:57,066 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-10-04 09:42:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:42:57,067 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-10-04 09:42:57,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:42:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-10-04 09:42:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-10-04 09:42:57,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:42:57,070 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-10-04 09:42:57,070 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:42:57,070 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:42:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-10-04 09:42:57,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:42:57,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:42:57,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:57,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:42:57,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:42:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:42:57,314 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:42:57,547 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:57,723 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:42:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-10-04 09:42:58,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:42:58,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:42:58,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:42:58,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:42:58,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:42:58,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:42:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-10-04 09:42:59,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:42:59,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:42:59,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:42:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:42:59,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:42:59,752 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-10-04 09:43:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:00,481 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-10-04 09:43:00,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:43:00,481 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-10-04 09:43:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:00,484 INFO L225 Difference]: With dead ends: 689 [2018-10-04 09:43:00,484 INFO L226 Difference]: Without dead ends: 687 [2018-10-04 09:43:00,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.4s impTime 13 [2018-10-04 09:43:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-10-04 09:43:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-10-04 09:43:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-10-04 09:43:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-10-04 09:43:00,906 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-10-04 09:43:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:00,906 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-10-04 09:43:00,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:43:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-10-04 09:43:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-10-04 09:43:00,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:00,910 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-10-04 09:43:00,910 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:00,910 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-10-04 09:43:00,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:00,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:00,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:00,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:00,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:01,462 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:01,704 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:02,037 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-04 09:43:02,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:02,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:02,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:43:04,331 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-10-04 09:43:04,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:04,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-04 09:43:05,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:05,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:43:05,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:43:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:43:05,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:05,941 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-10-04 09:43:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:06,776 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-10-04 09:43:06,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:43:06,777 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-10-04 09:43:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:06,779 INFO L225 Difference]: With dead ends: 701 [2018-10-04 09:43:06,779 INFO L226 Difference]: Without dead ends: 699 [2018-10-04 09:43:06,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 0.8s impTime 14 [2018-10-04 09:43:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-10-04 09:43:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-10-04 09:43:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-10-04 09:43:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-10-04 09:43:07,195 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-10-04 09:43:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:07,196 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-10-04 09:43:07,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:43:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-10-04 09:43:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-10-04 09:43:07,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:07,199 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-10-04 09:43:07,199 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:07,199 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-10-04 09:43:07,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:07,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:07,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:07,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:07,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:07,439 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:07,665 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:07,896 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-10-04 09:43:08,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:08,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:08,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:43:10,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-10-04 09:43:10,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:10,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-10-04 09:43:11,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:11,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:43:11,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:43:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:43:11,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:11,675 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-10-04 09:43:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:12,496 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-10-04 09:43:12,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:43:12,496 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-10-04 09:43:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:12,499 INFO L225 Difference]: With dead ends: 713 [2018-10-04 09:43:12,500 INFO L226 Difference]: Without dead ends: 711 [2018-10-04 09:43:12,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.6s impTime 15 [2018-10-04 09:43:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-10-04 09:43:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-10-04 09:43:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-10-04 09:43:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-10-04 09:43:12,972 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-10-04 09:43:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:12,973 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-10-04 09:43:12,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:43:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-10-04 09:43:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-10-04 09:43:12,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:12,977 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-10-04 09:43:12,977 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:12,977 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:12,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-10-04 09:43:12,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:12,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:12,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:12,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:12,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:13,262 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:13,502 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:13,845 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-10-04 09:43:14,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:14,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:14,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:43:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:14,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-10-04 09:43:16,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:16,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:43:16,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:43:16,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:43:16,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:16,317 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-10-04 09:43:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:17,138 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-10-04 09:43:17,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:43:17,138 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-10-04 09:43:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:17,140 INFO L225 Difference]: With dead ends: 725 [2018-10-04 09:43:17,140 INFO L226 Difference]: Without dead ends: 723 [2018-10-04 09:43:17,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.6s impTime 16 [2018-10-04 09:43:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-10-04 09:43:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-10-04 09:43:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-10-04 09:43:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-10-04 09:43:17,595 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-10-04 09:43:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:17,595 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-10-04 09:43:17,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:43:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-10-04 09:43:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-10-04 09:43:17,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:17,599 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-10-04 09:43:17,599 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:17,599 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-10-04 09:43:17,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:17,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:17,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:17,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:43:17,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:17,930 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:18,139 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:18,266 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-10-04 09:43:18,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:18,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:18,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:43:19,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:43:19,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:19,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-10-04 09:43:20,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:20,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:43:20,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:43:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:43:20,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:20,872 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-10-04 09:43:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:21,793 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-10-04 09:43:21,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:43:21,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-10-04 09:43:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:21,796 INFO L225 Difference]: With dead ends: 737 [2018-10-04 09:43:21,796 INFO L226 Difference]: Without dead ends: 735 [2018-10-04 09:43:21,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.4s impTime 17 [2018-10-04 09:43:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-10-04 09:43:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-10-04 09:43:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-04 09:43:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-10-04 09:43:22,258 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-10-04 09:43:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:22,259 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-10-04 09:43:22,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:43:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-10-04 09:43:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-10-04 09:43:22,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:22,263 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-10-04 09:43:22,263 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:22,263 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:22,264 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-10-04 09:43:22,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:22,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:22,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:22,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:22,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:22,521 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:22,746 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:22,952 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-10-04 09:43:23,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:23,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:23,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:43:25,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-10-04 09:43:25,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:25,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-10-04 09:43:26,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:26,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 09:43:26,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:43:26,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:43:26,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:26,942 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-10-04 09:43:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:27,844 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-10-04 09:43:27,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:43:27,845 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-10-04 09:43:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:27,847 INFO L225 Difference]: With dead ends: 749 [2018-10-04 09:43:27,847 INFO L226 Difference]: Without dead ends: 747 [2018-10-04 09:43:27,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.4s impTime 18 [2018-10-04 09:43:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-10-04 09:43:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-10-04 09:43:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-10-04 09:43:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-10-04 09:43:28,384 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-10-04 09:43:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:28,385 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-10-04 09:43:28,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:43:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-10-04 09:43:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-10-04 09:43:28,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:28,389 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-10-04 09:43:28,389 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:28,389 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-10-04 09:43:28,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:28,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:28,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:28,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:28,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:28,683 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:28,814 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:29,058 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-10-04 09:43:29,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:29,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:29,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:43:30,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:43:30,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:30,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-10-04 09:43:31,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:31,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:43:31,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:43:31,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:43:31,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:31,785 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-10-04 09:43:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:33,090 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-10-04 09:43:33,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:43:33,090 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-10-04 09:43:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:33,093 INFO L225 Difference]: With dead ends: 761 [2018-10-04 09:43:33,093 INFO L226 Difference]: Without dead ends: 759 [2018-10-04 09:43:33,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.6s impTime 19 [2018-10-04 09:43:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-10-04 09:43:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-10-04 09:43:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-10-04 09:43:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-10-04 09:43:33,592 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-10-04 09:43:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:33,593 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-10-04 09:43:33,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:43:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-10-04 09:43:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-10-04 09:43:33,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:33,597 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-10-04 09:43:33,597 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:33,597 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-10-04 09:43:33,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:33,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:33,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:33,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:33,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:33,892 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:34,053 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:34,243 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-10-04 09:43:34,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:34,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:34,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:43:37,064 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-10-04 09:43:37,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:37,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-10-04 09:43:38,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:38,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:43:38,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:43:38,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:43:38,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:38,542 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-10-04 09:43:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:39,487 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-10-04 09:43:39,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:43:39,487 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-10-04 09:43:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:39,489 INFO L225 Difference]: With dead ends: 773 [2018-10-04 09:43:39,489 INFO L226 Difference]: Without dead ends: 771 [2018-10-04 09:43:39,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.5s impTime 20 [2018-10-04 09:43:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-10-04 09:43:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-10-04 09:43:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-10-04 09:43:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-10-04 09:43:40,074 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-10-04 09:43:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:40,074 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-10-04 09:43:40,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:43:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-10-04 09:43:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-10-04 09:43:40,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:40,078 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-10-04 09:43:40,079 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:40,079 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:40,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-10-04 09:43:40,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:40,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:40,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:40,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:40,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:40,439 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:40,727 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:40,946 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-10-04 09:43:41,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:41,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:41,654 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:43:43,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-10-04 09:43:43,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:43,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-10-04 09:43:45,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:45,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:43:45,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:43:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:43:45,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:45,321 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-10-04 09:43:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:46,305 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-10-04 09:43:46,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:43:46,305 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-10-04 09:43:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:46,308 INFO L225 Difference]: With dead ends: 785 [2018-10-04 09:43:46,308 INFO L226 Difference]: Without dead ends: 783 [2018-10-04 09:43:46,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.6s impTime 18 [2018-10-04 09:43:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-10-04 09:43:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-10-04 09:43:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-10-04 09:43:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-10-04 09:43:46,924 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-10-04 09:43:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:46,924 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-10-04 09:43:46,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:43:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-10-04 09:43:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-10-04 09:43:46,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:46,929 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-10-04 09:43:46,929 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:46,929 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-10-04 09:43:46,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:46,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:46,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:46,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:46,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:47,203 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:47,381 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:47,597 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-10-04 09:43:48,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:48,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:48,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:43:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:48,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-10-04 09:43:50,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:50,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:43:50,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:43:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:43:50,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:50,231 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-10-04 09:43:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:51,265 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-10-04 09:43:51,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:43:51,265 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-10-04 09:43:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:51,268 INFO L225 Difference]: With dead ends: 797 [2018-10-04 09:43:51,268 INFO L226 Difference]: Without dead ends: 795 [2018-10-04 09:43:51,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.5s impTime 21 [2018-10-04 09:43:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-10-04 09:43:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-10-04 09:43:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-10-04 09:43:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-10-04 09:43:51,863 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-10-04 09:43:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:51,863 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-10-04 09:43:51,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:43:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-10-04 09:43:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-10-04 09:43:51,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:51,868 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-10-04 09:43:51,868 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:51,868 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-10-04 09:43:51,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:51,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:51,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:51,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:43:51,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:52,134 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:52,235 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:52,367 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-10-04 09:43:53,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:53,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:53,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:43:53,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:43:53,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:43:53,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:43:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-10-04 09:43:55,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:43:55,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:43:55,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:43:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:43:55,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:43:55,007 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-10-04 09:43:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:43:56,027 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-10-04 09:43:56,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:43:56,027 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-10-04 09:43:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:43:56,030 INFO L225 Difference]: With dead ends: 809 [2018-10-04 09:43:56,030 INFO L226 Difference]: Without dead ends: 807 [2018-10-04 09:43:56,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.2s impTime 20 [2018-10-04 09:43:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-10-04 09:43:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-10-04 09:43:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-10-04 09:43:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-10-04 09:43:56,620 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-10-04 09:43:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:43:56,621 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-10-04 09:43:56,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:43:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-10-04 09:43:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-10-04 09:43:56,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:43:56,625 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-10-04 09:43:56,625 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:43:56,625 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:43:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-10-04 09:43:56,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:43:56,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:43:56,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:56,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:43:56,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:43:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:43:56,932 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:43:57,032 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:57,191 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:43:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-10-04 09:43:58,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:43:58,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:43:58,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:44:00,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-10-04 09:44:00,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:00,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-10-04 09:44:02,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:02,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 09:44:02,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:44:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:44:02,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:02,274 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-10-04 09:44:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:03,343 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-10-04 09:44:03,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:44:03,344 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-10-04 09:44:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:03,346 INFO L225 Difference]: With dead ends: 821 [2018-10-04 09:44:03,347 INFO L226 Difference]: Without dead ends: 819 [2018-10-04 09:44:03,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.4s impTime 23 [2018-10-04 09:44:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-10-04 09:44:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-10-04 09:44:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-10-04 09:44:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-10-04 09:44:03,980 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-10-04 09:44:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:03,980 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-10-04 09:44:03,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:44:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-10-04 09:44:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-10-04 09:44:03,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:03,985 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-10-04 09:44:03,985 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:03,985 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-10-04 09:44:03,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:03,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:03,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:44:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:04,314 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:04,486 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:04,674 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-10-04 09:44:05,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:05,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:05,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:44:05,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:44:05,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:05,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-10-04 09:44:07,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:07,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:44:07,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:44:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:44:07,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:07,760 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-10-04 09:44:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:08,875 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-10-04 09:44:08,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:44:08,876 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-10-04 09:44:08,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:08,879 INFO L225 Difference]: With dead ends: 833 [2018-10-04 09:44:08,879 INFO L226 Difference]: Without dead ends: 831 [2018-10-04 09:44:08,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.4s impTime 22 [2018-10-04 09:44:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-10-04 09:44:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-10-04 09:44:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-10-04 09:44:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-10-04 09:44:09,578 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-10-04 09:44:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:09,579 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-10-04 09:44:09,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:44:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-10-04 09:44:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-10-04 09:44:09,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:09,584 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-10-04 09:44:09,584 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:09,584 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-10-04 09:44:09,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:09,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:09,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:09,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:44:09,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:09,865 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:10,021 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:10,149 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-10-04 09:44:10,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:10,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:10,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:44:13,453 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-10-04 09:44:13,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:13,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-10-04 09:44:15,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:15,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:44:15,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:44:15,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:44:15,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:15,368 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-10-04 09:44:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:16,456 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-10-04 09:44:16,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:44:16,456 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-10-04 09:44:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:16,459 INFO L225 Difference]: With dead ends: 845 [2018-10-04 09:44:16,459 INFO L226 Difference]: Without dead ends: 843 [2018-10-04 09:44:16,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.3s impTime 24 [2018-10-04 09:44:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-10-04 09:44:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-10-04 09:44:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-10-04 09:44:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-10-04 09:44:17,170 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-10-04 09:44:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:17,170 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-10-04 09:44:17,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:44:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-10-04 09:44:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-10-04 09:44:17,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:17,176 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-10-04 09:44:17,176 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:17,176 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-10-04 09:44:17,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:17,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:17,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:17,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:44:17,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:17,472 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:17,625 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:17,839 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-10-04 09:44:18,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:18,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:18,592 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:44:21,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-10-04 09:44:21,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:21,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-10-04 09:44:23,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:23,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:44:23,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:44:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:44:23,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:23,156 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-10-04 09:44:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:24,310 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-10-04 09:44:24,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:44:24,310 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-10-04 09:44:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:24,313 INFO L225 Difference]: With dead ends: 857 [2018-10-04 09:44:24,313 INFO L226 Difference]: Without dead ends: 855 [2018-10-04 09:44:24,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.5s impTime 24 [2018-10-04 09:44:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-10-04 09:44:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-10-04 09:44:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-10-04 09:44:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-10-04 09:44:25,059 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-10-04 09:44:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:25,060 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-10-04 09:44:25,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:44:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-10-04 09:44:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-10-04 09:44:25,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:25,065 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-10-04 09:44:25,066 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:25,066 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-10-04 09:44:25,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:25,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:25,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:25,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:44:25,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:25,348 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:25,501 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:25,713 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:26,031 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:44:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-10-04 09:44:26,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:26,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:26,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:44:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:27,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-10-04 09:44:28,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:28,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 09:44:28,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:44:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:44:28,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:28,937 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-10-04 09:44:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:30,142 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-10-04 09:44:30,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:44:30,142 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-10-04 09:44:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:30,144 INFO L225 Difference]: With dead ends: 869 [2018-10-04 09:44:30,144 INFO L226 Difference]: Without dead ends: 867 [2018-10-04 09:44:30,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.6s impTime 9 [2018-10-04 09:44:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-10-04 09:44:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-10-04 09:44:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-10-04 09:44:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-10-04 09:44:30,906 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-10-04 09:44:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:30,906 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-10-04 09:44:30,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:44:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-10-04 09:44:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-10-04 09:44:30,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:30,911 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-10-04 09:44:30,911 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:30,911 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-10-04 09:44:30,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:30,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:30,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:30,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:44:30,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:31,192 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:31,317 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:31,513 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:32,108 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:44:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-10-04 09:44:32,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:32,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:32,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:44:33,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:44:33,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:33,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-10-04 09:44:35,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:35,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:44:35,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:44:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:44:35,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:35,087 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-10-04 09:44:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:36,307 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-10-04 09:44:36,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:44:36,308 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-10-04 09:44:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:36,309 INFO L225 Difference]: With dead ends: 881 [2018-10-04 09:44:36,309 INFO L226 Difference]: Without dead ends: 879 [2018-10-04 09:44:36,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.7s impTime 8 [2018-10-04 09:44:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-10-04 09:44:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-10-04 09:44:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-10-04 09:44:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-10-04 09:44:37,083 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-10-04 09:44:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:37,084 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-10-04 09:44:37,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:44:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-10-04 09:44:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-10-04 09:44:37,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:37,089 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-10-04 09:44:37,089 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:37,089 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-10-04 09:44:37,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:37,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:37,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:44:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:37,389 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:37,539 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:37,753 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:37,930 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:44:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-10-04 09:44:38,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:38,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:38,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:44:41,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-10-04 09:44:41,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:41,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:44:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-10-04 09:44:43,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:43,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 09:44:43,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:44:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:44:43,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:43,541 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-10-04 09:44:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:44:44,807 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-10-04 09:44:44,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:44:44,807 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-10-04 09:44:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:44:44,809 INFO L225 Difference]: With dead ends: 893 [2018-10-04 09:44:44,809 INFO L226 Difference]: Without dead ends: 891 [2018-10-04 09:44:44,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.4s impTime 11 [2018-10-04 09:44:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-10-04 09:44:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-10-04 09:44:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-10-04 09:44:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-10-04 09:44:45,639 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-10-04 09:44:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:44:45,640 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-10-04 09:44:45,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:44:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-10-04 09:44:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-10-04 09:44:45,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:44:45,645 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-10-04 09:44:45,646 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:44:45,646 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:44:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-10-04 09:44:45,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:44:45,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:44:45,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:45,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:44:45,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:44:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:44:45,948 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:44:46,122 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:46,403 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:44:46,980 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:44:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-10-04 09:44:48,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:44:48,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:44:48,117 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:44:48,577 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:44:48,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:44:48,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-04 09:44:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-10-04 09:44:50,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:44:50,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:44:50,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:44:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:44:50,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:44:50,480 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-10-04 09:44:50,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-04 09:44:50,481 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:44:50,486 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:44:50,487 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:44:50 BoogieIcfgContainer [2018-10-04 09:44:50,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:44:50,488 INFO L168 Benchmark]: Toolchain (without parser) took 248691.37 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -669.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-04 09:44:50,489 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:44:50,490 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:44:50,490 INFO L168 Benchmark]: Boogie Preprocessor took 19.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:44:50,491 INFO L168 Benchmark]: RCFGBuilder took 322.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:44:50,498 INFO L168 Benchmark]: TraceAbstraction took 248302.52 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -690.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-04 09:44:50,501 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 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 322.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248302.52 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -690.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was constructing difference of abstraction (880states) and FLOYD_HOARE automaton (currently 2 states, 76 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 248.2s OverallTime, 78 OverallIterations, 730 TraceHistogramMax, 43.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 306 SDtfs, 5396 SDslu, 3843 SDs, 0 SdLazy, 6772 SolverSat, 472 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35626 GetRequests, 32587 SyntacticMatches, 0 SemanticMatches, 3039 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=880occurred in iteration=77, 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: 18.5s AutomataMinimizationTime, 77 MinimizatonAttempts, 774 StatesRemovedByMinimization, 73 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.9s SsaConstructionTime, 44.6s SatisfiabilityAnalysisTime, 118.0s InterpolantComputationTime, 65252 NumberOfCodeBlocks, 65091 NumberOfCodeBlocksAsserted, 8019 NumberOfCheckSat, 65098 ConstructedInterpolants, 0 QuantifiedInterpolants, 114960136 SizeOfPredicates, 76 NumberOfNonLiveVariables, 130446 ConjunctsInSsa, 2877 ConjunctsInUnsatCore, 154 InterpolantComputations, 2 PerfectInterpolantSequences, 299593/16116545 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-44-50-513.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-44-50-513.csv Completed graceful shutdown