java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:18:27,343 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:18:27,345 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:18:27,357 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:18:27,358 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:18:27,359 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:18:27,360 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:18:27,362 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:18:27,363 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:18:27,364 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:18:27,365 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:18:27,389 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:18:27,404 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:18:27,405 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:18:27,406 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:18:27,406 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:18:27,406 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:18:27,407 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:18:27,407 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:18:27,407 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:18:27,407 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:18:27,407 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:18:27,408 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:18:27,408 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:18:27,408 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:18:27,408 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:18:27,408 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:18:27,409 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:18:27,409 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:18:27,409 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:18:27,409 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:18:27,409 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:18:27,410 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:18:27,410 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:18:27,410 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:18:27,410 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:18:27,410 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:18:27,411 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:18:27,411 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:18:27,411 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:18:27,411 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:18:27,411 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:18:27,458 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:18:27,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:18:27,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:18:27,478 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:18:27,479 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:18:27,480 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:18:27,480 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 10:18:27,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:18:27,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:18:27,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:18:27,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:18:27,542 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:18:27,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:18:27,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:18:27,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:18:27,583 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:18:27,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... [2018-09-30 10:18:27,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:18:27,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:18:27,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:18:27,605 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:18:27,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:18:27,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:18:27,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:18:27,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:18:27,877 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:18:27,877 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:18:27 BoogieIcfgContainer [2018-09-30 10:18:27,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:18:27,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:18:27,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:18:27,882 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:18:27,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:27" (1/2) ... [2018-09-30 10:18:27,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1f9931 and model type count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:18:27, skipping insertion in model container [2018-09-30 10:18:27,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:18:27" (2/2) ... [2018-09-30 10:18:27,886 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:18:27,896 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:18:27,904 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:18:27,960 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:18:27,961 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:18:27,961 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:18:27,963 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:18:27,964 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:18:27,964 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:18:27,964 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:18:27,964 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:18:27,965 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:18:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:18:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:18:28,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:28,005 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:18:28,008 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:28,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:28,015 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 10:18:28,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:28,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:28,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:28,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:28,227 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:18:28,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:18:28,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:18:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:18:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:18:28,249 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:18:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:28,302 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:18:28,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:18:28,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:18:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:28,315 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:18:28,315 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:18:28,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:18:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:18:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:18:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:18:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:18:28,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:18:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:28,372 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:18:28,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:18:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:18:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:18:28,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:28,373 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:18:28,374 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:28,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 10:18:28,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:28,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:28,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:28,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:28,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:28,518 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 [2018-09-30 10:18:28,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:28,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:28,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:28,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 10:18:28,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:18:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:18:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:28,658 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 10:18:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:28,699 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:18:28,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:18:28,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 10:18:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:28,701 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:18:28,702 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:18:28,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:18:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:18:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:18:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:18:28,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 10:18:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:28,710 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:18:28,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:18:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:18:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:18:28,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:28,710 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:18:28,711 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:28,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 2 times [2018-09-30 10:18:28,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:28,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:28,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:28,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:28,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:28,872 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 [2018-09-30 10:18:28,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:28,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:28,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:28,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:29,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:29,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 10:18:29,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:18:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:18:29,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:18:29,002 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 10:18:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:29,427 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:18:29,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:18:29,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 10:18:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:29,428 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:18:29,428 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:18:29,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:18:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:18:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:18:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:18:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:18:29,433 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 10:18:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:29,434 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:18:29,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:18:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:18:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:18:29,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:29,435 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:18:29,436 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:29,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 3 times [2018-09-30 10:18:29,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:29,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:29,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:29,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:29,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:29,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:29,579 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 [2018-09-30 10:18:29,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:29,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:18:29,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:29,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:29,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:29,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 10:18:29,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:18:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:18:29,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:18:29,660 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 10:18:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:30,020 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 10:18:30,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:18:30,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 10:18:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:30,022 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:18:30,023 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:18:30,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:18:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:18:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:18:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:18:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:18:30,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 10:18:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:30,028 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:18:30,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:18:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:18:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:18:30,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:30,029 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:18:30,029 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:30,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 4 times [2018-09-30 10:18:30,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:30,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:30,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:30,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:30,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:30,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:30,675 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 [2018-09-30 10:18:30,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:30,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:30,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:30,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:30,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:30,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 10:18:30,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:18:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:18:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:18:30,817 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 10:18:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:31,074 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 10:18:31,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:18:31,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 10:18:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:31,075 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:18:31,076 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:18:31,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:18:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:18:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:18:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:18:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:18:31,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 10:18:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:31,081 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:18:31,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:18:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:18:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:18:31,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:31,082 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:18:31,083 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:31,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 5 times [2018-09-30 10:18:31,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:31,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:31,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:31,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:31,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:31,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:31,507 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 [2018-09-30 10:18:31,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:31,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:18:31,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:31,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:31,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:31,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 10:18:31,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:18:31,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:18:31,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:18:31,645 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 10:18:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:32,049 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 10:18:32,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:18:32,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 10:18:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:32,051 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:18:32,051 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:18:32,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:18:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:18:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:18:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:18:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:18:32,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 10:18:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:32,057 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:18:32,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:18:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:18:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:18:32,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:32,058 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:18:32,058 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:32,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 6 times [2018-09-30 10:18:32,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:32,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:32,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:32,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:32,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:32,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:32,332 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 [2018-09-30 10:18:32,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:18:32,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:18:32,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:32,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:32,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:32,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 10:18:32,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:18:32,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:18:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:18:32,422 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 10:18:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:33,027 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 10:18:33,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:18:33,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 10:18:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:33,030 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:18:33,031 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:18:33,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:18:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:18:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:18:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:18:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:18:33,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 10:18:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:33,037 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:18:33,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:18:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:18:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:18:33,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:33,038 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:18:33,038 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:33,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:33,038 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 7 times [2018-09-30 10:18:33,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:33,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:33,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:33,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:33,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:33,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:33,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:18:33,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:33,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:33,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:33,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 10:18:33,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:18:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:18:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:18:33,574 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 10:18:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:34,233 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 10:18:34,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:18:34,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 10:18:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:34,234 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:18:34,235 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:18:34,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:18:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:18:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:18:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:18:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:18:34,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 10:18:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:34,242 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:18:34,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:18:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:18:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:18:34,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:34,243 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:18:34,243 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:34,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 8 times [2018-09-30 10:18:34,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:34,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:34,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:34,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:34,796 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 [2018-09-30 10:18:34,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:34,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:34,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:34,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:34,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:34,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 10:18:34,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:18:34,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:18:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:18:34,925 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 10:18:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:35,699 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 10:18:35,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:18:35,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 10:18:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:35,701 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:18:35,702 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:18:35,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:18:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:18:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:18:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:18:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:18:35,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 10:18:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:35,708 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:18:35,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:18:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:18:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:18:35,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:35,709 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:18:35,709 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:35,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 9 times [2018-09-30 10:18:35,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:35,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:35,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:35,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:35,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:36,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:36,073 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 [2018-09-30 10:18:36,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:36,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:18:36,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:36,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:36,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:36,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 10:18:36,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:18:36,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:18:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:18:36,253 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 10:18:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:37,193 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 10:18:37,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:18:37,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 10:18:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:37,194 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:18:37,194 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:18:37,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:18:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:18:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:18:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:18:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:18:37,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 10:18:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:37,201 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:18:37,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:18:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:18:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:18:37,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:37,202 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:18:37,202 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:37,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 10 times [2018-09-30 10:18:37,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:37,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:37,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:37,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:37,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:37,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:37,573 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 [2018-09-30 10:18:37,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:37,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:37,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:37,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:37,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:37,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 10:18:37,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:18:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:18:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:18:37,721 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 10:18:38,586 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-09-30 10:18:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:39,061 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 10:18:39,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:18:39,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 10:18:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:39,062 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:18:39,062 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:18:39,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:18:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:18:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:18:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:18:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:18:39,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 10:18:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:39,068 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:18:39,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:18:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:18:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:18:39,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:39,069 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:18:39,070 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:39,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:39,070 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 11 times [2018-09-30 10:18:39,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:39,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:39,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:39,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:39,456 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 [2018-09-30 10:18:39,467 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:39,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:18:39,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:39,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:39,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:39,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 10:18:39,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:18:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:18:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:18:39,654 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 10:18:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:40,684 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 10:18:40,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:18:40,685 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 10:18:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:40,686 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:18:40,686 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:18:40,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:18:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:18:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:18:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:18:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:18:40,692 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 10:18:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:40,693 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:18:40,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:18:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:18:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:18:40,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:40,694 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:18:40,694 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:40,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:40,694 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 12 times [2018-09-30 10:18:40,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:40,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:40,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:40,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:40,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:41,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:41,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:18:41,152 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:18:41,300 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:18:41,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:41,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:41,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:41,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 10:18:41,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:18:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:18:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:18:41,462 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 10:18:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:42,691 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 10:18:42,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:18:42,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 10:18:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:42,692 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:18:42,692 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:18:42,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:18:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:18:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:18:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:18:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:18:42,700 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 10:18:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:42,700 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:18:42,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:18:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:18:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:18:42,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:42,701 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:18:42,701 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:42,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 13 times [2018-09-30 10:18:42,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:42,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:42,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:42,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:42,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:43,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:43,136 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 [2018-09-30 10:18:43,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:43,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:43,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:43,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 10:18:43,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:18:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:18:43,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:18:43,371 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 10:18:43,706 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-30 10:18:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:45,053 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 10:18:45,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:18:45,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 10:18:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:45,054 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:18:45,054 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:18:45,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:18:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:18:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:18:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:18:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:18:45,060 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 10:18:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:45,060 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:18:45,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:18:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:18:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:18:45,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:45,062 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:18:45,062 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:45,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 14 times [2018-09-30 10:18:45,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:45,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:45,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:45,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:45,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:45,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:45,612 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 [2018-09-30 10:18:45,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:45,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:45,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:45,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:45,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:45,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 10:18:45,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:18:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:18:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:18:45,937 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 10:18:47,085 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-30 10:18:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:47,902 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 10:18:47,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:18:47,903 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 10:18:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:47,904 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:18:47,904 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:18:47,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:18:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:18:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:18:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:18:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:18:47,912 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 10:18:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:47,913 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:18:47,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:18:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:18:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:18:47,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:47,914 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:18:47,914 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:47,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 15 times [2018-09-30 10:18:47,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:47,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:47,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:47,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:47,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:49,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:49,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:18:49,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:49,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:18:49,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:49,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:49,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:49,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 10:18:49,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:18:49,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:18:49,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:18:49,160 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 10:18:49,377 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2018-09-30 10:18:51,432 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-09-30 10:18:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:51,899 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 10:18:51,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:18:51,899 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 10:18:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:51,900 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:18:51,901 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:18:51,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:18:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:18:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:18:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:18:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:18:51,908 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 10:18:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:51,909 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:18:51,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:18:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:18:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:18:51,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:51,910 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:18:51,910 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:51,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 16 times [2018-09-30 10:18:51,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:51,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:51,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:51,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:51,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:52,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:52,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:18:52,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:52,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:52,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:52,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:52,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:52,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 10:18:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:18:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:18:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:18:52,721 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 10:18:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:54,956 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 10:18:54,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:18:54,957 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 10:18:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:54,957 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:18:54,958 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:18:54,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:18:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:18:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:18:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:18:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:18:54,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 10:18:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:54,965 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:18:54,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:18:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:18:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:18:54,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:54,966 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:18:54,966 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:54,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 17 times [2018-09-30 10:18:54,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:54,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:54,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:54,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:55,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:55,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:18:55,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:55,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:18:55,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:55,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:55,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:55,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 10:18:55,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:18:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:18:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:18:55,951 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 10:18:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:58,462 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 10:18:58,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:18:58,463 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 10:18:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:58,463 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:18:58,464 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:18:58,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:18:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:18:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:18:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:18:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:18:58,472 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 10:18:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:58,473 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:18:58,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:18:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:18:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:18:58,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:58,474 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:18:58,474 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:58,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 18 times [2018-09-30 10:18:58,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:58,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:58,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:58,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:58,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:00,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:00,006 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 [2018-09-30 10:19:00,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:00,037 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:19:00,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:00,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:00,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:00,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 10:19:00,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:19:00,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:19:00,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:19:00,155 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 10:19:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:02,956 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 10:19:02,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:19:02,956 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 10:19:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:02,957 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:19:02,957 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:19:02,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:19:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:19:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:19:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:19:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:19:02,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 10:19:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:02,966 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:19:02,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:19:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:19:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:19:02,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:02,967 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:19:02,967 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:02,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 19 times [2018-09-30 10:19:02,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:02,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:02,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:02,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:02,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:03,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:03,827 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 [2018-09-30 10:19:03,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:03,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:04,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:04,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 10:19:04,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:19:04,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:19:04,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:19:04,072 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 10:19:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,319 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 10:19:07,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:19:07,319 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 10:19:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,320 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:19:07,320 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:19:07,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:19:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:19:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:19:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:19:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:19:07,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 10:19:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:07,328 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:19:07,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:19:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:19:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:19:07,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:07,329 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:19:07,330 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:07,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 20 times [2018-09-30 10:19:07,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:07,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:07,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:07,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:08,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:08,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:19:08,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:08,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:08,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:08,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:08,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:08,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 10:19:08,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:19:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:19:08,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:19:08,499 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 10:19:11,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:11,971 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 10:19:11,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:19:11,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 10:19:11,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:11,972 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:19:11,972 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:19:11,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:19:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:19:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:19:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:19:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:19:11,982 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 10:19:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:11,982 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:19:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:19:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:19:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:19:11,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:11,983 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:19:11,984 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:11,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:11,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 21 times [2018-09-30 10:19:11,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:11,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:11,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:11,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:13,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:13,065 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 [2018-09-30 10:19:13,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:13,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:19:13,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:13,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:13,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:13,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 10:19:13,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:19:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:19:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:19:13,217 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 10:19:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:17,433 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 10:19:17,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:19:17,436 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 10:19:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:17,437 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:19:17,437 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:19:17,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:19:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:19:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:19:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:19:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:19:17,444 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 10:19:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:17,444 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:19:17,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:19:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:19:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:19:17,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:17,445 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:19:17,445 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:17,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 22 times [2018-09-30 10:19:17,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:17,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:17,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:17,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:18,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:18,708 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 [2018-09-30 10:19:18,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:18,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:18,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:18,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:19,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:19,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 10:19:19,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:19:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:19:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:19:19,037 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 10:19:19,269 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2018-09-30 10:19:19,394 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-30 10:19:19,573 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-30 10:19:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:23,626 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 10:19:23,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:19:23,627 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 10:19:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:23,628 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:19:23,628 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:19:23,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:19:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:19:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:19:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:19:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:19:23,634 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 10:19:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:23,635 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:19:23,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:19:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:19:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:19:23,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:23,635 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:19:23,635 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:23,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 23 times [2018-09-30 10:19:23,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:23,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:23,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:23,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:23,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:25,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:25,188 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 [2018-09-30 10:19:25,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:25,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:19:25,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:25,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:25,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:25,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 10:19:25,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:19:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:19:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:19:25,456 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 10:19:25,848 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 10:19:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:30,622 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 10:19:30,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:19:30,623 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 10:19:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:30,624 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:19:30,624 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:19:30,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:19:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:19:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:19:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:19:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:19:30,631 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 10:19:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:30,631 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:19:30,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:19:30,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:19:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:19:30,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:30,632 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:19:30,632 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:30,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 24 times [2018-09-30 10:19:30,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:30,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:32,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:32,405 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 [2018-09-30 10:19:32,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:32,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:19:32,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:32,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:33,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:33,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 10:19:33,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:19:33,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:19:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:19:33,034 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 10:19:33,275 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-30 10:19:33,400 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:19:33,549 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 10:19:33,677 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 10:19:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:38,536 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 10:19:38,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:19:38,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 10:19:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:38,538 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:19:38,538 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:19:38,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:19:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:19:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:19:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:19:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:19:38,546 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 10:19:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:38,546 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:19:38,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:19:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:19:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:19:38,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:38,547 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:19:38,547 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:38,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 25 times [2018-09-30 10:19:38,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:38,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:40,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:40,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:19:40,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:40,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:40,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:40,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 10:19:40,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:19:40,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:19:40,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:19:40,874 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 10:19:41,003 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-30 10:19:41,123 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-30 10:19:41,247 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:19:41,378 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:19:41,513 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:19:41,644 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 10:19:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:46,952 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 10:19:46,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:19:46,952 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 10:19:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:46,953 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:19:46,953 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:19:46,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:19:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:19:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:19:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:19:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:19:46,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 10:19:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:46,961 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:19:46,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:19:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:19:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:19:46,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:46,962 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:19:46,962 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:46,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 26 times [2018-09-30 10:19:46,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:46,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:46,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:46,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:46,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:48,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:48,720 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 [2018-09-30 10:19:48,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:48,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:48,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:49,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:49,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:49,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 10:19:49,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:19:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:19:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:19:49,208 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 10:19:49,372 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-09-30 10:19:49,496 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-30 10:19:49,628 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:19:49,763 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:19:49,913 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:19:50,060 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:19:50,201 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:19:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:55,885 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 10:19:55,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:19:55,886 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 10:19:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:55,886 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:19:55,886 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:19:55,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:19:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:19:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:19:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:19:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:19:55,892 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 10:19:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:55,892 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:19:55,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:19:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:19:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:19:55,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:55,892 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:19:55,893 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:55,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 27 times [2018-09-30 10:19:55,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:55,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:55,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:55,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:55,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:57,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:57,418 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 [2018-09-30 10:19:57,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:57,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:19:57,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:57,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:57,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:57,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 10:19:57,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:19:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:19:57,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:19:57,587 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 10:19:57,727 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-30 10:19:57,856 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-30 10:19:57,992 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:19:58,133 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:19:58,279 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:19:58,470 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:19:58,614 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:19:58,902 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:20:00,324 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-09-30 10:20:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:04,671 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 10:20:04,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:20:04,671 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 10:20:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:04,672 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:20:04,672 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:20:04,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:20:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:20:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:20:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:20:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:20:04,678 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 10:20:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:04,678 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:20:04,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:20:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:20:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:20:04,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:04,679 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:20:04,679 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:04,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 28 times [2018-09-30 10:20:04,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:04,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:04,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:04,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:04,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:06,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:06,712 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 [2018-09-30 10:20:06,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:06,965 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:06,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:07,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:07,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:07,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 10:20:07,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:20:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:20:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:20:07,228 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 10:20:07,382 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-30 10:20:07,521 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-30 10:20:07,691 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:20:07,841 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:20:07,996 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:20:08,141 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:20:08,291 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:20:08,442 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:20:08,601 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:20:08,753 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:20:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:15,012 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 10:20:15,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:20:15,013 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 10:20:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:15,014 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:20:15,014 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:20:15,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:20:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:20:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:20:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:20:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:20:15,021 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 10:20:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:15,021 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:20:15,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:20:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:20:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:20:15,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:15,022 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:20:15,022 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:15,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 29 times [2018-09-30 10:20:15,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:15,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:15,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:15,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:15,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:17,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:17,097 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 [2018-09-30 10:20:17,104 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:17,337 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:20:17,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:17,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:17,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:17,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 10:20:17,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:20:17,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:20:17,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:20:17,538 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 10:20:17,692 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-30 10:20:17,839 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-30 10:20:17,992 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:20:18,153 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:20:18,310 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:20:18,463 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:20:18,621 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:20:18,771 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:20:18,931 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:20:19,094 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:20:19,258 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:20:19,422 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:20:19,597 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:20:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:26,466 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 10:20:26,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:20:26,466 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 10:20:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:26,467 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:20:26,467 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:20:26,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:20:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:20:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:20:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:20:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:20:26,473 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 10:20:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:20:26,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:20:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:20:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:20:26,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:26,475 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:20:26,475 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:26,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:26,475 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 30 times [2018-09-30 10:20:26,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:26,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:26,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:26,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:26,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:28,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:28,361 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 [2018-09-30 10:20:28,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:28,415 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:20:28,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:28,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:28,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:28,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 10:20:28,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:20:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:20:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:20:28,539 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 10:20:28,702 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-30 10:20:28,858 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-30 10:20:29,026 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:20:29,187 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:20:29,353 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:20:29,513 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:20:29,677 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:20:29,845 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:20:30,018 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:20:30,186 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:20:30,359 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:20:30,531 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:20:30,697 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:20:30,876 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:20:31,089 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:20:31,282 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 10:20:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:37,801 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 10:20:37,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:20:37,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 10:20:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:37,803 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:20:37,803 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:20:37,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 10:20:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:20:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:20:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:20:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:20:37,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 10:20:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:37,809 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:20:37,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:20:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:20:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:20:37,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:37,810 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:20:37,810 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:37,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 31 times [2018-09-30 10:20:37,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:37,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:37,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:37,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:37,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:39,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:39,837 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 [2018-09-30 10:20:39,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:40,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:40,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:40,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 10:20:40,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:20:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:20:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:20:40,491 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 10:20:40,666 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-30 10:20:40,834 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-30 10:20:41,000 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:20:41,214 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:20:41,425 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:20:41,587 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:20:41,757 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:20:41,929 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:20:42,111 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:20:42,291 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:20:42,463 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:20:42,637 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:20:42,814 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:20:42,983 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:20:43,176 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:20:43,362 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:20:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:50,505 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 10:20:50,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:20:50,506 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 10:20:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:50,507 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:20:50,507 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:20:50,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 10:20:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:20:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:20:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:20:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:20:50,513 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 10:20:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:50,513 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:20:50,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:20:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:20:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:20:50,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:50,514 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:20:50,514 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:50,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 32 times [2018-09-30 10:20:50,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:50,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:50,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:50,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:53,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:53,067 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 [2018-09-30 10:20:53,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:53,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:53,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:53,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:53,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:53,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 10:20:53,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:20:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:20:53,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:20:53,847 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 10:20:54,025 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-30 10:20:54,202 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-30 10:20:54,377 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:20:54,557 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:20:54,742 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:20:54,921 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:20:55,102 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:20:55,288 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:20:55,478 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:20:55,669 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:20:55,855 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:20:56,046 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:20:56,232 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:20:56,424 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:20:56,652 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:20:56,867 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:20:57,070 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:20:57,274 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:20:57,475 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:20:57,883 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 10:20:58,931 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-30 10:21:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:04,689 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 10:21:04,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:21:04,690 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 10:21:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:04,691 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:21:04,691 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:21:04,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 10:21:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:21:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:21:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:21:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:21:04,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 10:21:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:04,698 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:21:04,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:21:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:21:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:21:04,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:04,699 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:21:04,699 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:04,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 33 times [2018-09-30 10:21:04,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:04,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:04,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:04,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:04,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:07,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:07,437 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 [2018-09-30 10:21:07,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:07,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:21:07,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:07,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:07,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:07,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 10:21:07,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:21:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:21:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:21:07,640 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 10:21:07,821 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-30 10:21:07,999 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-30 10:21:08,199 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 10:21:08,392 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 10:21:08,585 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:21:08,777 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:21:08,968 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:21:09,159 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:21:09,358 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:21:09,563 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:21:09,763 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:21:09,966 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:21:10,165 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:21:10,354 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:21:10,575 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:21:10,783 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:21:10,996 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:21:11,210 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:21:11,417 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:21:11,620 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:21:11,836 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:21:12,054 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 10:21:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:19,284 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 10:21:19,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:21:19,284 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 10:21:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:19,285 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:21:19,285 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:21:19,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 10:21:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:21:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:21:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:21:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:21:19,290 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 10:21:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:19,290 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:21:19,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:21:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:21:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:21:19,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:19,291 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:21:19,291 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:19,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:19,291 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 34 times [2018-09-30 10:21:19,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:19,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:19,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:19,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:19,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:21,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:21,806 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 [2018-09-30 10:21:21,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:22,244 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:22,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:22,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:22,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:22,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 10:21:22,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:21:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:21:22,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:21:22,650 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 10:21:22,843 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-30 10:21:23,025 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-30 10:21:23,222 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 10:21:23,421 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 10:21:23,622 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 10:21:23,822 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 10:21:24,017 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:21:24,229 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:21:24,435 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:21:24,639 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:21:24,845 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:21:25,058 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:21:25,275 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:21:25,480 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:21:25,705 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:21:25,926 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:21:26,144 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:21:26,368 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:21:26,592 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:21:26,816 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:21:27,044 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:21:27,278 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:21:27,508 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:21:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:35,185 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 10:21:35,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:21:35,186 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 10:21:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:35,187 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:21:35,187 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:21:35,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 10:21:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:21:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:21:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:21:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:21:35,195 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 10:21:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:35,195 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:21:35,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:21:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:21:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:21:35,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:35,196 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:21:35,196 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:35,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 35 times [2018-09-30 10:21:35,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:35,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:35,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:35,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:35,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:38,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:38,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:21:38,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:38,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:21:38,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:38,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:38,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:38,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 10:21:38,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:21:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:21:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:21:38,759 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 10:21:38,958 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-30 10:21:39,151 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-30 10:21:39,348 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 10:21:39,560 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 10:21:39,769 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 10:21:39,979 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 10:21:40,186 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 10:21:40,393 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 10:21:40,613 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:21:40,833 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:21:41,053 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:21:41,284 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:21:41,498 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:21:41,714 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:21:41,954 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:21:42,178 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:21:42,410 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:21:42,658 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:21:42,899 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:21:43,134 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:21:43,379 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:21:43,601 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:21:43,835 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:21:44,290 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 10:21:45,919 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-30 10:21:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:52,269 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 10:21:52,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:21:52,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 10:21:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:52,270 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:21:52,270 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:21:52,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 10:21:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:21:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:21:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:21:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:21:52,278 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 10:21:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:52,278 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:21:52,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:21:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:21:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:21:52,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:52,279 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:21:52,279 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:52,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:52,280 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 36 times [2018-09-30 10:21:52,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:52,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:52,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:52,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:52,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:55,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:55,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:21:55,442 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:55,491 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:21:55,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:55,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:55,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:55,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 10:21:55,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:21:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:21:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:21:55,653 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 10:21:55,897 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-30 10:21:56,104 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-30 10:21:56,319 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 10:21:56,537 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 10:21:56,760 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 10:21:56,975 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 10:21:57,195 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 10:21:57,410 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 10:21:57,634 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 10:21:57,870 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 10:21:58,114 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:21:58,371 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:21:58,595 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:21:58,810 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:21:59,055 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:21:59,309 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:21:59,542 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:21:59,791 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:22:00,042 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:22:00,299 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:22:00,550 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:22:00,792 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:22:01,040 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:22:01,291 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:22:01,546 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:22:01,775 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:22:03,229 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-30 10:22:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:10,530 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 10:22:10,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:22:10,530 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 10:22:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:10,531 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:22:10,531 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:22:10,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 10:22:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:22:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:22:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:22:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:22:10,538 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 10:22:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:10,539 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:22:10,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:22:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:22:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:22:10,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:10,543 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 10:22:10,543 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:10,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 37 times [2018-09-30 10:22:10,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:10,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:10,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:13,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:13,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:22:13,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:14,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:14,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:14,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 10:22:14,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:22:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:22:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:22:14,990 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 10:22:15,225 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-30 10:22:15,438 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-30 10:22:15,667 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 10:22:15,894 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 10:22:16,122 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 10:22:16,348 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 10:22:16,577 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 10:22:16,800 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 10:22:17,049 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 10:22:17,301 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 10:22:17,533 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 10:22:17,765 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 10:22:18,016 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:22:18,251 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:22:18,541 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:22:18,805 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:22:19,055 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:22:19,315 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:22:19,566 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:22:19,831 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:22:20,094 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:22:20,346 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:22:20,605 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:22:20,863 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:22:21,126 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:22:21,379 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 10:22:21,646 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 10:22:21,897 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 10:22:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:30,798 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 10:22:30,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:22:30,799 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 10:22:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:30,800 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:22:30,800 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:22:30,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 10:22:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:22:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:22:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:22:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:22:30,807 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 10:22:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:30,807 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:22:30,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:22:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:22:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:22:30,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:30,808 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 10:22:30,809 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:30,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 38 times [2018-09-30 10:22:30,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:30,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:30,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:30,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:30,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:34,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:34,155 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 [2018-09-30 10:22:34,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:34,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:34,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:35,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:35,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:35,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 10:22:35,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:22:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:22:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:22:35,256 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 10:22:35,508 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-30 10:22:35,738 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-30 10:22:35,968 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 10:22:36,203 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 10:22:36,447 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 10:22:36,678 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 10:22:36,911 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 10:22:37,149 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 10:22:37,398 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 10:22:37,658 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 10:22:37,910 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 10:22:38,167 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 10:22:38,408 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 10:22:38,642 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 10:22:38,915 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 10:22:39,185 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 10:22:39,447 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 10:22:39,711 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 10:22:39,984 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 10:22:40,270 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 10:22:40,544 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 10:22:40,825 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 10:22:41,099 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 10:22:41,372 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 10:22:41,644 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 10:22:41,912 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 10:22:42,187 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 10:22:42,459 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 Received shutdown request... [2018-09-30 10:22:42,723 WARN L186 SmtUtils]: Removed 6 from assertion stack [2018-09-30 10:22:42,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:22:42,724 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:22:42,728 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:22:42,729 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:22:42 BoogieIcfgContainer [2018-09-30 10:22:42,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:22:42,730 INFO L168 Benchmark]: Toolchain (without parser) took 255192.94 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -186.6 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 229.8 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2018-09-30 10:22:42,730 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. [2018-09-30 10:22:42,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.78 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:22:42,730 INFO L168 Benchmark]: Boogie Preprocessor took 21.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:22:42,730 INFO L168 Benchmark]: RCFGBuilder took 273.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:22:42,731 INFO L168 Benchmark]: TraceAbstraction took 254850.26 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -186.6 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 208.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2018-09-30 10:22:42,732 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 40.78 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.40 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 273.18 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 254850.26 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -186.6 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 208.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was constructing difference of abstraction (79states) and FLOYD_HOARE automaton (currently 30 states, 79 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 152. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 254.7s OverallTime, 39 OverallIterations, 75 TraceHistogramMax, 190.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 115 SDtfs, 0 SDslu, 1427 SDs, 0 SdLazy, 3073 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4439 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 2917 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33521 ImplicationChecksByTransitivity, 233.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 53.2s InterpolantComputationTime, 3119 NumberOfCodeBlocks, 3119 NumberOfCodeBlocksAsserted, 444 NumberOfCheckSat, 3042 ConstructedInterpolants, 0 QuantifiedInterpolants, 781682 SizeOfPredicates, 76 NumberOfNonLiveVariables, 4978 ConjunctsInSsa, 1584 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/74594 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/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-22-42-739.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-22-42-739.csv Completed graceful shutdown