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/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:24:11,809 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:24:11,811 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:24:11,828 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:24:11,828 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:24:11,829 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:24:11,830 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:24:11,832 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:24:11,834 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:24:11,834 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:24:11,835 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:24:11,872 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 23:24:11,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:24:11,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:24:11,901 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:24:11,901 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:24:11,902 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:24:11,902 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:24:11,902 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:24:11,902 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:24:11,902 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:24:11,903 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:24:11,903 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:24:11,903 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:24:11,903 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:24:11,903 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:24:11,904 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:24:11,904 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:24:11,904 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:24:11,904 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:24:11,904 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:24:11,905 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:24:11,905 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:24:11,905 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:24:11,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:24:11,906 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:24:11,906 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:24:11,906 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:24:11,906 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:24:11,906 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:24:11,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:24:11,907 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:24:11,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:24:11,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:24:11,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:24:11,992 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:24:11,992 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:24:11,993 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-09-30 23:24:11,994 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-09-30 23:24:12,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:24:12,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:24:12,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:24:12,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:24:12,050 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:24:12,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:24:12,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:24:12,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:24:12,089 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:24:12,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/1) ... [2018-09-30 23:24:12,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:24:12,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:24:12,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:24:12,109 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:24:12,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (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 23:24:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:24:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:24:12,394 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:24:12,394 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:24:12 BoogieIcfgContainer [2018-09-30 23:24:12,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:24:12,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:24:12,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:24:12,399 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:24:12,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:24:12" (1/2) ... [2018-09-30 23:24:12,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f83a60b and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:24:12, skipping insertion in model container [2018-09-30 23:24:12,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:24:12" (2/2) ... [2018-09-30 23:24:12,402 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bpl [2018-09-30 23:24:12,415 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:24:12,424 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:24:12,477 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:24:12,478 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:24:12,478 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:24:12,479 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:24:12,479 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:24:12,479 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:24:12,479 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:24:12,479 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:24:12,480 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:24:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:24:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:24:12,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:12,503 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:24:12,504 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:12,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:24:12,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:12,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:12,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:12,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:12,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:12,829 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-09-30 23:24:12,831 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 23:24:12,834 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:24:12,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:24:12,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:24:12,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:24:12,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:24:12,859 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:24:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:12,944 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:24:12,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:24:12,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:24:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:12,958 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:24:12,959 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:24:12,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:24:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:24:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:24:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:24:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:24:13,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:24:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:13,018 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:24:13,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:24:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:24:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:24:13,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:13,019 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:24:13,020 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:13,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 23:24:13,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:13,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:13,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:13,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:13,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:13,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:13,115 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 23:24:13,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:13,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:13,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:13,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 23:24:13,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:24:13,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:24:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:24:13,302 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-09-30 23:24:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:13,362 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 23:24:13,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:24:13,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-09-30 23:24:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:13,363 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:24:13,364 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:24:13,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 23:24:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:24:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:24:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:24:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:24:13,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-09-30 23:24:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:13,369 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:24:13,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:24:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:24:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:24:13,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:13,371 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:24:13,371 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:13,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 2 times [2018-09-30 23:24:13,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:13,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:13,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:13,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:13,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:13,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:13,525 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 23:24:13,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:13,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:13,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:13,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:13,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:13,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 23:24:13,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:24:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:24:13,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:24:13,641 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-09-30 23:24:13,974 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-09-30 23:24:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:14,100 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 23:24:14,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:24:14,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 23:24:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:14,101 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:24:14,101 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:24:14,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:24:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:24:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:24:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:24:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:24:14,108 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-09-30 23:24:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:14,109 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:24:14,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:24:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:24:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:24:14,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:14,110 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:24:14,111 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:14,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 3 times [2018-09-30 23:24:14,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:14,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:14,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:14,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:14,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:14,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:14,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:24:14,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:14,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:14,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 23:24:14,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:24:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:24:14,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:24:14,424 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2018-09-30 23:24:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:14,718 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 23:24:14,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:24:14,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-09-30 23:24:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:14,720 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:24:14,720 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:24:14,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 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 23:24:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:24:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:24:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:24:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:24:14,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-09-30 23:24:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:14,728 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:24:14,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:24:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:24:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:24:14,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:14,729 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:24:14,729 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:14,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:14,729 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 4 times [2018-09-30 23:24:14,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:14,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:14,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:14,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:15,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:15,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:15,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:15,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:15,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:15,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:15,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:15,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 23:24:15,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:24:15,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:24:15,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:24:15,421 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2018-09-30 23:24:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:15,694 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 23:24:15,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:24:15,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 23:24:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:15,697 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:24:15,697 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:24:15,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:24:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:24:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:24:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:24:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:24:15,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-09-30 23:24:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:15,704 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:24:15,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:24:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:24:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:24:15,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:15,705 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:24:15,706 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:15,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 5 times [2018-09-30 23:24:15,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:15,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:15,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:15,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:16,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:16,109 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 23:24:16,119 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:16,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:24:16,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:16,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:16,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:16,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 23:24:16,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:24:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:24:16,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:24:16,229 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-09-30 23:24:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:16,684 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 23:24:16,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:24:16,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-09-30 23:24:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:16,686 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:24:16,687 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:24:16,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 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 23:24:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:24:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:24:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:24:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:24:16,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-09-30 23:24:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:16,695 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:24:16,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:24:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:24:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:24:16,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:16,696 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:24:16,697 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:16,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 6 times [2018-09-30 23:24:16,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:16,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:16,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:16,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:16,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:16,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:16,931 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 23:24:16,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:16,961 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 23:24:16,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:16,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:17,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:17,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 23:24:17,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:24:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:24:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:24:17,063 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-09-30 23:24:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:17,752 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 23:24:17,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:24:17,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-09-30 23:24:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:17,756 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:24:17,756 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:24:17,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 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 23:24:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:24:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:24:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:24:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:24:17,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-09-30 23:24:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:17,765 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:24:17,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:24:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:24:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:24:17,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:17,766 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:24:17,766 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:17,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 7 times [2018-09-30 23:24:17,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:17,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:17,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:18,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:18,039 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 23:24:18,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:18,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:18,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:18,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 23:24:18,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:24:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:24:18,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:24:18,138 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-09-30 23:24:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:18,851 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 23:24:18,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:24:18,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-30 23:24:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:18,853 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:24:18,853 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:24:18,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 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 23:24:18,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:24:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:24:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:24:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:24:18,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-09-30 23:24:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:18,862 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:24:18,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:24:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:24:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:24:18,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:18,863 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:24:18,864 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:18,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 8 times [2018-09-30 23:24:18,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:18,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:18,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:18,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:18,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:19,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:19,439 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 23:24:19,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:19,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:19,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:19,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:19,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:19,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 23:24:19,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:24:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:24:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:24:19,571 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2018-09-30 23:24:19,853 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 9 [2018-09-30 23:24:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:20,341 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 23:24:20,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:24:20,341 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2018-09-30 23:24:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:20,342 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:24:20,342 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:24:20,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 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 23:24:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:24:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:24:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:24:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:24:20,351 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-09-30 23:24:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:20,351 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:24:20,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:24:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:24:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:24:20,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:20,353 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:24:20,353 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:20,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 9 times [2018-09-30 23:24:20,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:20,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:20,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:20,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:20,695 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 23:24:20,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:20,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:24:20,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:20,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:20,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 23:24:20,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:24:20,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:24:20,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:24:20,876 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 21 states. [2018-09-30 23:24:21,224 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 11 [2018-09-30 23:24:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:21,937 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 23:24:21,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:24:21,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2018-09-30 23:24:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:21,940 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:24:21,940 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:24:21,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:24:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:24:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:24:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:24:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:24:21,949 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-09-30 23:24:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:21,949 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:24:21,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:24:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:24:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:24:21,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:21,951 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:24:21,951 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:21,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 10 times [2018-09-30 23:24:21,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:21,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:21,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:21,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:22,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:22,276 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 23:24:22,284 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:22,299 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:22,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:22,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:22,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:22,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 23:24:22,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:24:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:24:22,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:24:22,438 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 23 states. [2018-09-30 23:24:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:23,537 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 23:24:23,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:24:23,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2018-09-30 23:24:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:23,538 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:24:23,538 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:24:23,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:24:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:24:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:24:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:24:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:24:23,548 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-09-30 23:24:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:23,549 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:24:23,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:24:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:24:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:24:23,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:23,550 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:24:23,550 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:23,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:23,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 11 times [2018-09-30 23:24:23,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:23,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:23,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:23,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:23,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:23,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:23,960 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 23:24:23,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:24,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:24:24,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:24,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:24,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:24,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 23:24:24,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:24:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:24:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:24:24,120 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 25 states. [2018-09-30 23:24:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:25,109 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 23:24:25,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:24:25,111 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2018-09-30 23:24:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:25,112 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:24:25,112 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:24:25,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:24:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:24:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:24:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:24:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:24:25,120 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-09-30 23:24:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:25,123 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:24:25,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:24:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:24:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:24:25,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:25,125 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:24:25,125 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:25,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 12 times [2018-09-30 23:24:25,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:25,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:25,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:25,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:25,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:25,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:25,582 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 23:24:25,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:25,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 23:24:25,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:25,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:25,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:25,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 23:24:25,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:24:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:24:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:24:25,713 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 27 states. [2018-09-30 23:24:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:27,089 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 23:24:27,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:24:27,090 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2018-09-30 23:24:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:27,090 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:24:27,090 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:24:27,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 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 23:24:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:24:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:24:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:24:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:24:27,100 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-09-30 23:24:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:27,100 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:24:27,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:24:27,101 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:24:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:24:27,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:27,102 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 23:24:27,102 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:27,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 13 times [2018-09-30 23:24:27,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:27,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:27,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:27,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:27,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:27,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:27,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:27,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:27,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:28,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:28,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 23:24:28,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:24:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:24:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:24:28,017 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 29 states. [2018-09-30 23:24:28,360 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-30 23:24:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:29,602 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 23:24:29,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:24:29,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2018-09-30 23:24:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:29,604 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:24:29,604 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:24:29,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:24:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:24:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:24:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:24:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:24:29,613 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-09-30 23:24:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:29,614 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:24:29,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:24:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:24:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:24:29,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:29,615 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 23:24:29,615 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:29,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:29,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 14 times [2018-09-30 23:24:29,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:29,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:29,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:29,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:29,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:30,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:30,176 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 23:24:30,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:30,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:30,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:30,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:30,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:30,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 23:24:30,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:24:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:24:30,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:24:30,392 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 31 states. [2018-09-30 23:24:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:32,332 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 23:24:32,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:24:32,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2018-09-30 23:24:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:32,333 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:24:32,334 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:24:32,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:24:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:24:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:24:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:24:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:24:32,344 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-09-30 23:24:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:32,344 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:24:32,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:24:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:24:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:24:32,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:32,346 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 23:24:32,346 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:32,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 15 times [2018-09-30 23:24:32,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:32,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:32,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:32,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:32,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:33,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:33,382 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 23:24:33,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:33,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:24:33,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:33,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:33,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:33,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 23:24:33,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:24:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:24:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:24:33,533 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 33 states. [2018-09-30 23:24:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:35,851 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 23:24:35,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:24:35,852 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2018-09-30 23:24:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:35,853 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:24:35,853 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:24:35,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:24:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:24:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:24:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:24:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:24:35,863 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-09-30 23:24:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:35,863 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:24:35,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:24:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:24:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:24:35,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:35,865 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 23:24:35,867 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:35,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 16 times [2018-09-30 23:24:35,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:35,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:35,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:35,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:37,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:37,305 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 23:24:37,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:37,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:37,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:37,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:37,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:37,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 23:24:37,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:24:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:24:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:24:37,492 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2018-09-30 23:24:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:39,649 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 23:24:39,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:24:39,650 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2018-09-30 23:24:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:39,651 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:24:39,651 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:24:39,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:24:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:24:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:24:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:24:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:24:39,660 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-09-30 23:24:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:39,661 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:24:39,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:24:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:24:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:24:39,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:39,662 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 23:24:39,662 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:39,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:39,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 17 times [2018-09-30 23:24:39,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:39,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:39,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:39,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:40,407 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 23:24:40,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:40,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:24:40,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:40,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:40,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 23:24:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:24:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:24:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:24:40,593 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 37 states. [2018-09-30 23:24:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:42,988 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 23:24:42,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:24:42,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2018-09-30 23:24:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:42,989 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:24:42,989 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:24:42,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:24:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:24:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:24:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:24:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:24:43,000 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-09-30 23:24:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:43,000 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:24:43,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:24:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:24:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:24:43,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:43,002 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 23:24:43,002 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:43,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 18 times [2018-09-30 23:24:43,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:43,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:43,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:43,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:43,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:43,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:43,941 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 23:24:43,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:43,983 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-09-30 23:24:43,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:43,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:44,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:44,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 23:24:44,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:24:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:24:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:24:44,081 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 39 states. [2018-09-30 23:24:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:46,844 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 23:24:46,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:24:46,844 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2018-09-30 23:24:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:46,845 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:24:46,846 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:24:46,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:24:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:24:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:24:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:24:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:24:46,855 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-09-30 23:24:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:46,856 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:24:46,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:24:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:24:46,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:24:46,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:46,857 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 23:24:46,857 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:46,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 19 times [2018-09-30 23:24:46,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:46,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:47,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:47,704 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 23:24:47,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:47,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:47,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:47,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 23:24:47,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:24:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:24:47,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:24:47,948 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 41 states. [2018-09-30 23:24:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:51,142 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 23:24:51,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:24:51,143 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 78 [2018-09-30 23:24:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:51,144 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:24:51,144 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:24:51,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:24:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:24:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:24:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:24:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:24:51,150 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-09-30 23:24:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:51,150 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:24:51,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:24:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:24:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:24:51,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:51,152 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 23:24:51,152 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:51,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 20 times [2018-09-30 23:24:51,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:51,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:51,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:51,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:51,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:52,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:52,146 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 23:24:52,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:52,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:52,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:52,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:52,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:52,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 23:24:52,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:24:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:24:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:24:52,421 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 43 states. [2018-09-30 23:24:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:55,995 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 23:24:55,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:24:55,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2018-09-30 23:24:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:55,997 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:24:55,997 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:24:56,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:24:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:24:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:24:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:24:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:24:56,006 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-09-30 23:24:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:56,007 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:24:56,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:24:56,007 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:24:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:24:56,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:56,008 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 23:24:56,008 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:56,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 21 times [2018-09-30 23:24:56,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:56,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:56,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:56,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:56,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:57,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:57,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:57,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:57,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:24:57,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:57,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:57,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:57,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 23:24:57,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:24:57,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:24:57,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:24:57,258 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 45 states. [2018-09-30 23:24:57,924 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2018-09-30 23:25:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:01,432 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 23:25:01,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:25:01,435 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 86 [2018-09-30 23:25:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:01,436 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:25:01,436 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:25:01,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:25:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:25:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:25:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:25:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:25:01,442 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-09-30 23:25:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:01,442 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:25:01,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:25:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:25:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:25:01,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:01,443 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 23:25:01,444 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:01,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 22 times [2018-09-30 23:25:01,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:01,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:01,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:01,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:01,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:02,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:02,672 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 23:25:02,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:02,714 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:02,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:02,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:02,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:02,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 23:25:02,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:25:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:25:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:25:02,847 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 47 states. [2018-09-30 23:25:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:07,318 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 23:25:07,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:25:07,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2018-09-30 23:25:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:07,324 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:25:07,324 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:25:07,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:25:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:25:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:25:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:25:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:25:07,335 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-09-30 23:25:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:07,335 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:25:07,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:25:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:25:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:25:07,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:07,336 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 23:25:07,337 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:07,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 23 times [2018-09-30 23:25:07,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:07,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:07,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:07,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:07,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:08,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:08,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:25:08,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:08,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:25:08,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:08,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:08,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:08,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 23:25:08,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:25:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:25:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:25:08,863 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 49 states. [2018-09-30 23:25:09,123 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2018-09-30 23:25:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:13,809 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 23:25:13,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:25:13,809 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 94 [2018-09-30 23:25:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:13,810 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:25:13,810 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:25:13,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:25:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:25:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:25:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:25:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:25:13,818 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-09-30 23:25:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:13,818 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:25:13,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:25:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:25:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:25:13,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:13,820 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 23:25:13,820 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:13,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 24 times [2018-09-30 23:25:13,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:13,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:13,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:13,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:13,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:15,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:15,195 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 23:25:15,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:15,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2018-09-30 23:25:15,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:15,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:15,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:15,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 23:25:15,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:25:15,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:25:15,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:25:15,363 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 51 states. [2018-09-30 23:25:15,594 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-30 23:25:15,712 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:25:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:20,830 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 23:25:20,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:25:20,831 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 98 [2018-09-30 23:25:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:20,832 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:25:20,832 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:25:20,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:25:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:25:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:25:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:25:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:25:20,841 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-09-30 23:25:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:20,841 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:25:20,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:25:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:25:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:25:20,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:20,842 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 23:25:20,842 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:20,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:20,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 25 times [2018-09-30 23:25:20,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:20,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:20,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:20,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:20,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:22,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:22,239 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 23:25:22,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:22,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:23,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:23,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 23:25:23,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:25:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:25:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:25:23,656 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 53 states. [2018-09-30 23:25:23,785 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-30 23:25:23,903 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-30 23:25:24,036 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:25:24,161 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:25:24,301 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:25:24,436 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:25:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:29,786 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 23:25:29,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:25:29,788 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 102 [2018-09-30 23:25:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:29,789 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:25:29,789 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:25:29,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:25:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:25:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:25:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:25:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:25:29,798 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-09-30 23:25:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:29,799 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:25:29,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:25:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:25:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:25:29,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:29,800 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 23:25:29,800 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:29,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 26 times [2018-09-30 23:25:29,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:29,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:29,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:29,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:29,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:31,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:31,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:25:31,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:31,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:31,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:31,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:31,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:31,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 23:25:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:25:31,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:25:31,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:25:31,779 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 55 states. [2018-09-30 23:25:31,913 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-09-30 23:25:32,044 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-30 23:25:32,178 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:25:32,315 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:25:32,454 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:25:32,587 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:25:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:38,295 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 23:25:38,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:25:38,296 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 106 [2018-09-30 23:25:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:38,297 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:25:38,297 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:25:38,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:25:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:25:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:25:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:25:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:25:38,304 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-09-30 23:25:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:38,304 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:25:38,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:25:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:25:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:25:38,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:38,305 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 23:25:38,305 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:38,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 27 times [2018-09-30 23:25:38,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:38,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:38,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:38,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:38,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:40,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:40,255 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 23:25:40,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:40,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:25:40,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:40,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:40,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:40,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 23:25:40,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:25:40,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:25:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:25:40,474 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 57 states. [2018-09-30 23:25:40,617 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-30 23:25:40,760 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-30 23:25:40,900 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:25:41,041 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:25:41,182 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:25:41,324 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:25:41,472 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:25:41,616 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:25:41,759 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:25:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:47,526 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-30 23:25:47,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:25:47,526 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 110 [2018-09-30 23:25:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:47,527 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:25:47,527 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:25:47,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:25:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:25:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:25:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:25:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:25:47,535 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-09-30 23:25:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:47,535 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:25:47,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:25:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:25:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:25:47,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:47,536 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 23:25:47,536 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:47,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:47,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 28 times [2018-09-30 23:25:47,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:47,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:47,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:47,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:47,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:49,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:49,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:25:49,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:49,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:49,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:49,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:49,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:49,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 23:25:49,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:25:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:25:49,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:25:49,863 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 59 states. [2018-09-30 23:25:50,066 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-30 23:25:50,216 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-30 23:25:50,370 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:25:50,517 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:25:50,670 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:25:50,815 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:25:50,968 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:25:51,120 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:25:51,274 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:25:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:57,825 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-30 23:25:57,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:25:57,827 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2018-09-30 23:25:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:57,827 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:25:57,828 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:25:57,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:25:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:25:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:25:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:25:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:25:57,837 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-09-30 23:25:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:57,837 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:25:57,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:25:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:25:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:25:57,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:57,838 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 23:25:57,838 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:57,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 29 times [2018-09-30 23:25:57,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:57,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:57,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:59,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:59,723 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 23:25:59,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:59,988 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:25:59,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:00,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:00,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:00,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 23:26:00,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:26:00,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:26:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:26:00,211 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 61 states. [2018-09-30 23:26:00,405 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-30 23:26:00,561 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-30 23:26:00,715 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:00,873 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:01,031 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:01,178 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:01,340 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:01,499 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:01,662 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:01,826 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:01,989 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:26:02,150 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:26:02,319 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:26:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:08,908 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-30 23:26:08,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:26:08,908 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 118 [2018-09-30 23:26:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:08,910 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:26:08,910 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:26:08,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:26:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:26:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:26:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:26:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:26:08,920 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-09-30 23:26:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:08,920 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:26:08,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:26:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:26:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:26:08,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:08,922 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 23:26:08,922 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:08,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 30 times [2018-09-30 23:26:08,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:08,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:08,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:08,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:08,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:11,637 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 23:26:11,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:11,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 60 check-sat command(s) [2018-09-30 23:26:11,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:11,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:11,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 23:26:11,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:26:11,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:26:11,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:26:11,867 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 63 states. [2018-09-30 23:26:12,030 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-30 23:26:12,183 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-30 23:26:12,348 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:26:12,516 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:26:12,683 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:12,854 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:13,024 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:13,189 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:13,359 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:13,569 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:13,744 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:13,918 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:14,090 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:26:14,265 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:26:14,454 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:26:14,638 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:26:15,376 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-30 23:26:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:21,281 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-30 23:26:21,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:26:21,282 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 122 [2018-09-30 23:26:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:21,283 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:26:21,283 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:26:21,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:26:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:26:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:26:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:26:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:26:21,292 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-09-30 23:26:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:21,293 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:26:21,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:26:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:26:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:26:21,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:21,294 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 23:26:21,294 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:21,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 31 times [2018-09-30 23:26:21,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:21,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:21,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:21,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:21,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:23,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:23,545 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 23:26:23,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:24,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:24,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:24,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 23:26:24,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:26:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:26:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:26:24,215 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 65 states. [2018-09-30 23:26:24,391 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-30 23:26:24,561 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-30 23:26:24,733 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:26:24,903 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:26:25,085 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:26:25,254 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:26:25,428 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:25,611 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:25,810 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:26,010 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:26,195 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:26,372 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:26,550 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:26,733 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:26,924 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:26:27,110 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:26:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:34,177 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-30 23:26:34,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:26:34,178 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 126 [2018-09-30 23:26:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:34,179 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:26:34,179 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:26:34,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:26:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:26:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:26:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:26:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:26:34,189 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-09-30 23:26:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:34,190 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:26:34,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:26:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:26:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:26:34,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:34,191 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 23:26:34,191 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:34,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 32 times [2018-09-30 23:26:34,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:34,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:34,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:34,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:34,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:36,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:36,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:26:36,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:36,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:36,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:37,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:37,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:37,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 23:26:37,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:26:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:26:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:26:37,410 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 67 states. [2018-09-30 23:26:37,625 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-30 23:26:37,801 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-30 23:26:37,983 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:26:38,157 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:26:38,345 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:26:38,516 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:26:38,701 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:26:38,881 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:26:39,075 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:39,272 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:39,469 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:39,664 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:39,858 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:40,041 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:40,246 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:40,443 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:41,044 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:26:41,274 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:26:44,652 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 11 [2018-09-30 23:26:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:48,337 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-30 23:26:48,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:26:48,338 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 130 [2018-09-30 23:26:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:48,339 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:26:48,339 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:26:48,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:26:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:26:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:26:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:26:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:26:48,350 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-09-30 23:26:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:48,350 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:26:48,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:26:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:26:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:26:48,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:48,352 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 23:26:48,352 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:48,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 33 times [2018-09-30 23:26:48,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:48,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:48,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:50,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:50,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:26:50,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:51,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 23:26:51,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:51,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:51,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:51,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 23:26:51,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:26:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:26:51,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:26:51,405 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 69 states. [2018-09-30 23:26:51,658 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-30 23:26:51,836 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-30 23:26:52,026 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:26:52,207 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:26:52,397 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:26:52,595 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:26:52,782 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:26:52,976 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:26:53,169 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:26:53,369 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:26:53,582 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:26:53,780 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:26:53,984 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:26:54,180 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:26:54,392 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:26:54,602 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:26:54,818 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:26:55,034 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:26:55,248 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:26:55,460 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:26:55,665 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:26:55,875 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:26:56,502 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-30 23:27:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:03,193 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-30 23:27:03,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:27:03,194 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 134 [2018-09-30 23:27:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:03,195 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:27:03,195 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:27:03,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 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 23:27:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:27:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:27:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:27:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:27:03,203 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-09-30 23:27:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:03,203 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:27:03,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:27:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:27:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:27:03,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:03,204 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 23:27:03,204 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:03,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:03,204 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 34 times [2018-09-30 23:27:03,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:03,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:03,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:03,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:03,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:05,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:05,902 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 23:27:05,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:05,949 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:05,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:05,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:06,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:06,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 23:27:06,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:27:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:27:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:27:06,118 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 71 states. [2018-09-30 23:27:06,370 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-30 23:27:06,572 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-30 23:27:06,786 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:27:06,987 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:27:07,190 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:27:07,388 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:27:07,590 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:27:07,797 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:27:08,004 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:27:08,214 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:27:08,427 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:27:08,639 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:27:08,848 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:27:09,054 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:27:09,274 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:27:09,494 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:27:09,712 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:27:09,935 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:27:10,166 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:27:10,386 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:27:10,612 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:27:10,825 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:27:11,048 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:27:11,681 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 23:27:11,912 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-30 23:27:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:18,754 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-30 23:27:18,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:27:18,754 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 138 [2018-09-30 23:27:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:18,756 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:27:18,756 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:27:18,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:27:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:27:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:27:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:27:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:27:18,766 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-09-30 23:27:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:18,766 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:27:18,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:27:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:27:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:27:18,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:18,767 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 23:27:18,767 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:18,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 35 times [2018-09-30 23:27:18,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:18,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:18,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:18,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:21,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:21,397 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 23:27:21,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:21,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 23:27:21,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:21,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:22,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:22,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 23:27:22,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:27:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:27:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:27:22,084 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 73 states. [2018-09-30 23:27:22,329 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-30 23:27:22,525 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-30 23:27:22,728 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:27:22,929 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:27:23,140 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:27:23,344 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:27:23,559 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:27:23,764 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:27:23,991 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:27:24,211 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:27:24,429 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:27:24,655 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:27:24,880 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:27:25,093 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:27:25,326 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:27:25,559 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:27:25,802 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:27:26,036 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:27:26,273 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:27:26,504 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:27:26,753 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:27:27,004 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:27:27,244 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:27:27,481 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:27:27,706 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:27:27,927 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:27:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:35,697 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-30 23:27:35,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:27:35,698 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2018-09-30 23:27:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:35,700 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:27:35,700 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:27:35,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:27:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:27:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:27:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:27:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:27:35,710 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-09-30 23:27:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:35,711 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:27:35,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:27:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:27:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:27:35,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:35,712 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 23:27:35,712 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:35,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 36 times [2018-09-30 23:27:35,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:35,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:35,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:35,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:35,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:39,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:39,298 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 23:27:39,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:39,385 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2018-09-30 23:27:39,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:39,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:39,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:39,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 23:27:39,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:27:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:27:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:27:39,558 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 75 states. [2018-09-30 23:27:39,875 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-30 23:27:40,087 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-30 23:27:40,303 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:27:40,526 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:27:40,738 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:27:40,956 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:27:41,170 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:27:41,386 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:27:41,620 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:27:41,861 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:27:42,088 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:27:42,319 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:27:42,562 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:27:42,799 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:27:43,050 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:27:43,295 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:27:43,529 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:27:43,766 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:27:44,015 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:27:44,265 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:27:44,522 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:27:44,759 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:27:45,015 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:27:45,259 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:27:45,514 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:27:45,748 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:27:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:54,305 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-30 23:27:54,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:27:54,306 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 146 [2018-09-30 23:27:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:54,307 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:27:54,308 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:27:54,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:27:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:27:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:27:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:27:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:27:54,333 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-09-30 23:27:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:54,334 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:27:54,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:27:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:27:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:27:54,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:54,335 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 23:27:54,335 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:54,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 37 times [2018-09-30 23:27:54,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:54,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:54,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:54,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:54,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:58,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:58,466 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 23:27:58,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:59,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:59,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:59,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 23:27:59,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:27:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:27:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:27:59,625 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 77 states. [2018-09-30 23:27:59,857 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-30 23:28:00,080 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-30 23:28:00,302 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:28:00,530 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:28:00,757 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:28:00,982 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:28:01,208 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:28:01,445 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:28:01,685 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:28:01,928 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:28:02,166 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:28:02,409 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:28:02,646 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:28:02,876 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:28:03,135 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:28:03,404 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:28:03,670 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:28:03,933 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:28:04,187 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:28:04,454 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:28:04,718 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:28:04,976 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:28:05,236 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:28:05,495 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:28:05,759 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:28:06,028 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:28:06,297 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:28:07,025 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:28:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:15,400 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-30 23:28:15,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:28:15,401 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 150 [2018-09-30 23:28:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:15,402 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:28:15,402 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:28:15,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:28:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:28:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:28:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:28:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:28:15,414 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-09-30 23:28:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:15,414 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:28:15,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:28:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:28:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:28:15,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:15,415 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 23:28:15,416 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:15,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 38 times [2018-09-30 23:28:15,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:15,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:15,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:15,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:15,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:18,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:18,923 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 23:28:18,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:19,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:19,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:19,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:20,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:20,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 23:28:20,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:28:20,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:28:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:28:20,266 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 79 states. [2018-09-30 23:28:20,530 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-30 23:28:20,757 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-30 23:28:20,987 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:28:21,232 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:28:21,467 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:28:21,711 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:28:21,952 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:28:22,201 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:28:22,443 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:28:22,694 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:28:22,954 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:28:23,209 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:28:23,468 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:28:23,722 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:28:23,991 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:28:24,242 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:28:24,508 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:28:24,779 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:28:25,044 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:28:25,331 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:28:25,600 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:28:25,880 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:28:26,160 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:28:26,435 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:28:26,701 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:28:26,984 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:28:27,250 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:28:27,517 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:28:27,815 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:28:28,090 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:28:28,636 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:28:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:37,185 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-30 23:28:37,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:28:37,186 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 154 [2018-09-30 23:28:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:37,187 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:28:37,187 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:28:37,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=6005, Invalid=17557, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:28:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:28:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:28:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:28:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:28:37,197 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-09-30 23:28:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:37,197 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:28:37,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:28:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:28:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:28:37,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:37,198 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 23:28:37,198 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:37,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:37,199 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 39 times [2018-09-30 23:28:37,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:37,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:37,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:37,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:37,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:41,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:41,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:41,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:41,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 23:28:41,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:41,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:42,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:42,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-09-30 23:28:42,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:28:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:28:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6320, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:28:42,087 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 81 states. [2018-09-30 23:28:42,332 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2018-09-30 23:28:42,561 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-09-30 23:28:42,807 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:28:43,056 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:28:43,303 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:28:43,550 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:28:43,802 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:28:44,074 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:28:44,335 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:28:44,599 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:28:44,856 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:28:45,134 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:28:45,391 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:28:45,644 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:28:45,921 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:28:46,208 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:28:46,470 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:28:46,758 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:28:47,037 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:28:47,313 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:28:47,598 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:28:47,881 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:28:48,171 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:28:48,460 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:28:48,745 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:28:49,057 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:28:49,363 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:28:49,657 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:28:49,938 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:28:50,210 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:28:50,494 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:28:50,770 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:28:51,055 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:28:51,329 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:29:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:00,495 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-30 23:29:00,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:29:00,495 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 158 [2018-09-30 23:29:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:00,497 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:29:00,497 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:29:00,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=6319, Invalid=18487, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:29:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:29:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:29:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:29:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:29:00,509 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-09-30 23:29:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:00,510 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:29:00,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:29:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:29:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:29:00,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:00,511 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 23:29:00,511 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:00,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 40 times [2018-09-30 23:29:00,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:00,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:00,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:00,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:00,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:03,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:03,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:03,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:03,976 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:03,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:03,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:04,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:04,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-09-30 23:29:04,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:29:04,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:29:04,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6642, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:29:04,233 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 83 states. [2018-09-30 23:29:04,545 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 8 [2018-09-30 23:29:04,795 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2018-09-30 23:29:05,053 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:29:05,307 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:29:05,572 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:29:05,817 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:29:06,084 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:29:06,349 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:29:06,614 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:29:06,881 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:29:07,152 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:29:07,423 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:29:07,709 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:29:07,962 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:29:08,249 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:29:08,533 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:29:08,813 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:29:09,107 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:29:09,408 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:29:09,733 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:29:10,043 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:29:10,343 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:29:10,647 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:29:10,947 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:29:11,253 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:29:11,551 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:29:11,851 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:29:12,165 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:29:12,466 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:29:12,753 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:29:13,039 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:29:13,327 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:29:13,612 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:29:13,901 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:29:14,472 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:29:14,798 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:29:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:23,572 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-30 23:29:23,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:29:23,573 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 162 [2018-09-30 23:29:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:23,574 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:29:23,575 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:29:23,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=6641, Invalid=19441, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:29:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:29:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:29:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:29:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:29:23,584 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-09-30 23:29:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:23,584 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:29:23,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:29:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:29:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:29:23,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:23,586 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 23:29:23,586 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:23,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 41 times [2018-09-30 23:29:23,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:23,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:23,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:23,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:23,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:28,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:28,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:28,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:29,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 23:29:29,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:29,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:29,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:29,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-09-30 23:29:29,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:29:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:29:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6972, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:29:29,536 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 85 states. [2018-09-30 23:29:29,816 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 8 [2018-09-30 23:29:30,075 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2018-09-30 23:29:30,338 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:29:30,594 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:29:30,856 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:29:31,115 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:29:31,388 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:29:31,667 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:29:31,944 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:29:32,222 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:29:32,498 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:29:32,780 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:29:33,053 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:29:33,333 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:29:33,630 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:29:33,925 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:29:34,228 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:29:34,539 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:29:34,841 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:29:35,172 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:29:35,494 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:29:35,793 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:29:36,093 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:29:36,408 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:29:36,718 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:29:37,035 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:29:37,344 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:29:37,643 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:29:37,940 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:29:38,248 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:29:38,552 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:29:38,850 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:29:39,149 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:29:39,447 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:29:39,735 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:29:40,032 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:29:40,345 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:29:40,935 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:29:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:50,034 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-30 23:29:50,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:29:50,035 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 166 [2018-09-30 23:29:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:50,036 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:29:50,036 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:29:50,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=6971, Invalid=20419, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:29:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:29:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:29:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:29:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:29:50,048 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-09-30 23:29:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:50,049 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:29:50,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:29:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:29:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:29:50,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:50,050 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 23:29:50,050 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:50,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 42 times [2018-09-30 23:29:50,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:50,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:50,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:50,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:50,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:54,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:54,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:54,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:54,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2018-09-30 23:29:54,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:54,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:55,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:55,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-09-30 23:29:55,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:29:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:29:55,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7310, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:29:55,725 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 87 states. [2018-09-30 23:29:56,018 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 8 [2018-09-30 23:29:56,278 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2018-09-30 23:29:56,549 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:29:56,819 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:29:57,091 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:29:57,353 WARN L178 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:29:57,633 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:29:57,914 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:29:58,210 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:29:58,512 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:29:58,803 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:29:59,093 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:29:59,375 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:29:59,662 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:29:59,979 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:30:00,285 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:30:00,603 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:30:00,935 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:30:01,252 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:30:01,583 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:30:01,902 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:30:02,239 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:30:02,578 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:30:02,903 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:30:03,231 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:30:03,562 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:30:03,884 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:30:04,200 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:30:04,514 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:30:04,829 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:30:05,152 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:30:05,478 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:30:05,810 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:30:06,134 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:30:06,445 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:30:06,757 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:30:07,062 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:30:07,376 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:30:07,671 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:30:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:17,835 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-30 23:30:17,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:30:17,835 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 170 [2018-09-30 23:30:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:17,836 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:30:17,836 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:30:17,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=7309, Invalid=21421, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:30:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:30:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:30:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:30:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 23:30:17,849 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-09-30 23:30:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:17,849 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 23:30:17,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:30:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 23:30:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:30:17,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:17,850 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 23:30:17,850 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:17,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 43 times [2018-09-30 23:30:17,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:17,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:17,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:17,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:17,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:22,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:22,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:22,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:23,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:23,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:23,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-09-30 23:30:23,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:30:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:30:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7656, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:30:23,825 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 89 states. [2018-09-30 23:30:24,124 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 8 [2018-09-30 23:30:24,390 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2018-09-30 23:30:24,674 WARN L178 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:30:24,955 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:30:25,238 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:30:25,514 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:30:25,821 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:30:26,108 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:30:26,425 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:30:26,743 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:30:27,044 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:30:27,350 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:30:27,663 WARN L178 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:30:27,963 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:30:28,287 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:30:28,606 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:30:28,928 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:30:29,261 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:30:29,596 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:30:29,930 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:30:30,263 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:30:30,607 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:30:30,938 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:30:31,277 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:30:31,644 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:30:31,988 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:30:32,324 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:30:32,659 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:30:32,987 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:30:33,320 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:30:33,650 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:30:33,991 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:30:34,325 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:30:34,649 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:30:34,980 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:30:35,310 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:30:35,624 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:30:35,945 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:30:36,254 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:30:36,594 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:30:37,213 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:30:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:47,233 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-30 23:30:47,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:30:47,233 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 174 [2018-09-30 23:30:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:47,235 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:30:47,235 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:30:47,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=7655, Invalid=22447, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:30:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:30:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:30:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:30:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 23:30:47,244 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-09-30 23:30:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:47,245 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 23:30:47,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:30:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 23:30:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:30:47,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:47,245 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 23:30:47,246 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:47,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 44 times [2018-09-30 23:30:47,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:47,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:47,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:47,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:47,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:51,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:51,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:51,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:52,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:52,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:53,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:53,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:53,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-09-30 23:30:53,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:30:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:30:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:30:53,221 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 91 states. [2018-09-30 23:30:53,520 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 8 [2018-09-30 23:30:53,802 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2018-09-30 23:30:54,112 WARN L178 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:30:54,406 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:30:54,712 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:30:55,011 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:30:55,309 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:30:55,616 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:30:55,927 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:30:56,245 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:30:56,552 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:30:56,864 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:30:57,184 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:30:57,514 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:30:57,863 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:30:58,198 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:30:58,529 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:30:58,871 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:30:59,214 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:30:59,572 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:30:59,927 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:31:00,264 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:31:00,611 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:31:00,965 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:31:01,311 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:31:01,672 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:31:02,054 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:31:02,417 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:31:02,775 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:31:03,112 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:31:03,457 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:31:03,806 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:31:04,149 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:31:04,504 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:31:04,836 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:31:05,168 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:31:05,510 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:31:05,844 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:31:06,166 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:31:06,475 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:31:06,788 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:31:07,111 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:31:07,443 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:31:07,759 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:31:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:18,181 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-30 23:31:18,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:31:18,182 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 178 [2018-09-30 23:31:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:18,183 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:31:18,183 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:31:18,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=8009, Invalid=23497, Unknown=0, NotChecked=0, Total=31506 [2018-09-30 23:31:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:31:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 23:31:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:31:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 23:31:18,192 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-09-30 23:31:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:18,192 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 23:31:18,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:31:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 23:31:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:31:18,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:18,193 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 23:31:18,194 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:18,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 45 times [2018-09-30 23:31:18,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:18,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:18,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:18,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:22,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:22,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:22,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:31:22,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2018-09-30 23:31:22,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:22,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:22,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:22,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-09-30 23:31:22,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:31:22,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:31:22,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=8372, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:31:22,956 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 93 states. [2018-09-30 23:31:23,275 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 8 [2018-09-30 23:31:23,570 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2018-09-30 23:31:23,884 WARN L178 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:31:24,183 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:31:24,494 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:31:24,793 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:31:25,112 WARN L178 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:31:25,456 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:31:25,782 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:31:26,114 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:31:26,438 WARN L178 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:31:26,763 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:31:27,080 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:31:27,405 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:31:27,750 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:31:28,098 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:31:28,440 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:31:28,803 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:31:29,149 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:31:29,521 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:31:29,890 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:31:30,243 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:31:30,638 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:31:31,001 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:31:31,366 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:31:31,739 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:31:32,102 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:31:32,481 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:31:32,846 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:31:33,213 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:31:33,581 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:31:33,961 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:31:34,320 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:31:34,675 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:31:35,027 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:31:35,388 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:31:35,740 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:31:36,098 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:31:36,460 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:31:36,787 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:31:37,108 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:31:37,436 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:31:37,754 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:31:38,092 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:31:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:49,497 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-09-30 23:31:49,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:31:49,497 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 182 [2018-09-30 23:31:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:49,499 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:31:49,499 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:31:49,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=8371, Invalid=24571, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:31:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:31:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:31:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:31:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 23:31:49,508 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-09-30 23:31:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:49,508 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 23:31:49,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:31:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 23:31:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:31:49,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:49,509 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 23:31:49,510 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:49,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 46 times [2018-09-30 23:31:49,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:49,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:49,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:49,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:49,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:54,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:54,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:54,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:54,394 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:54,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:54,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:54,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:54,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-09-30 23:31:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:31:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:31:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8742, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:31:54,651 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 95 states. [2018-09-30 23:31:54,968 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 8 [2018-09-30 23:31:55,262 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2018-09-30 23:31:55,574 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:31:55,892 WARN L178 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:31:56,215 WARN L178 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:31:56,532 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:31:56,882 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:31:57,213 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:31:57,544 WARN L178 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:31:57,876 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:31:58,216 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:31:58,582 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:31:58,933 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:31:59,276 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:31:59,635 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:32:00,008 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:32:00,375 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:32:00,751 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:32:01,125 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:32:01,499 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:32:01,884 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:32:02,261 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:32:02,645 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:32:03,034 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:32:03,401 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:32:03,792 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:32:04,180 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:32:04,553 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:32:04,947 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:32:05,321 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:32:05,705 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:32:06,092 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:32:06,461 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:32:06,831 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:32:07,207 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:32:07,582 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:32:07,944 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:32:08,309 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:32:08,690 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:32:09,049 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:32:09,390 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:32:09,736 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:32:10,067 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:32:10,395 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:32:10,730 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:32:11,088 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:32:11,442 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:32:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:22,834 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-09-30 23:32:22,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:32:22,835 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 186 [2018-09-30 23:32:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:22,836 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:32:22,836 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:32:22,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=8741, Invalid=25669, Unknown=0, NotChecked=0, Total=34410 [2018-09-30 23:32:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:32:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:32:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:32:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 23:32:22,850 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-09-30 23:32:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:22,850 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 23:32:22,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:32:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 23:32:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:32:22,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:22,851 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 23:32:22,852 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:22,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:22,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 47 times [2018-09-30 23:32:22,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:22,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:22,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:22,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:22,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:27,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:27,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:28,694 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2018-09-30 23:32:28,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:28,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:29,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:29,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-09-30 23:32:29,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:32:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:32:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=9120, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:32:29,904 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 97 states. [2018-09-30 23:32:30,236 WARN L178 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 8 [2018-09-30 23:32:30,551 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2018-09-30 23:32:30,874 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:32:31,207 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:32:31,540 WARN L178 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:32:31,870 WARN L178 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:32:32,198 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:32:32,537 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:32:32,879 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:32:33,231 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:32:33,575 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:32:33,912 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:32:34,259 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:32:34,610 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:32:34,987 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:32:35,365 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:32:35,725 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:32:36,120 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:32:36,505 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:32:36,899 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:32:37,284 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:32:37,685 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:32:38,073 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:32:38,478 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:32:38,864 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:32:39,264 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:32:39,683 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:32:40,076 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:32:40,475 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:32:40,877 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:32:41,269 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:32:41,670 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:32:42,064 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:32:42,449 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:32:42,840 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:32:43,223 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:32:43,614 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:32:43,994 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:32:44,381 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:32:44,766 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:32:45,129 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:32:45,498 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:32:45,846 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:32:46,188 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:32:46,533 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:32:46,906 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:32:47,270 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:32:47,643 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:32:48,007 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:32:49,818 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-30 23:32:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:59,665 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-09-30 23:32:59,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:32:59,665 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 190 [2018-09-30 23:32:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:59,666 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:32:59,666 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:32:59,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4279 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=9119, Invalid=26791, Unknown=0, NotChecked=0, Total=35910 [2018-09-30 23:32:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:32:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:32:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:32:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 23:32:59,679 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-09-30 23:32:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:59,680 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 23:32:59,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:32:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 23:32:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:32:59,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:59,681 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 23:32:59,681 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:59,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:59,682 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 48 times [2018-09-30 23:32:59,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:59,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:59,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:59,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:59,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:04,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:04,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:04,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:04,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2018-09-30 23:33:04,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:04,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:04,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:04,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-09-30 23:33:04,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:33:04,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:33:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=9506, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:33:04,907 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 99 states. [2018-09-30 23:33:05,491 WARN L178 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 8 [2018-09-30 23:33:05,810 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 9 [2018-09-30 23:33:06,154 WARN L178 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:33:06,488 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:33:06,841 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:33:07,174 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:33:07,516 WARN L178 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:33:07,868 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:33:08,216 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:33:08,579 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:33:08,927 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:33:09,287 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:33:09,642 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:33:09,998 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:33:10,421 WARN L178 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:33:10,800 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:33:11,194 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:33:11,589 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:33:11,989 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:33:12,385 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:33:12,781 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:33:13,196 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:33:13,595 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:33:14,000 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:33:14,401 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:33:14,821 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:33:15,248 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:33:15,658 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:33:16,080 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:33:16,476 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:33:16,877 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:33:17,284 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:33:17,697 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:33:18,106 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:33:18,511 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:33:18,911 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:33:19,331 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:33:19,721 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:33:20,117 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:33:20,518 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:33:20,896 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:33:21,277 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:33:21,659 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:33:22,017 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:33:22,378 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:33:22,769 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:33:23,137 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:33:23,510 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:33:23,887 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:33:24,256 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:33:24,637 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:33:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:36,646 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-09-30 23:33:36,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:33:36,646 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 194 [2018-09-30 23:33:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:36,647 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:33:36,647 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:33:36,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4466 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=9505, Invalid=27937, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:33:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:33:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:33:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:33:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 23:33:36,657 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-09-30 23:33:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:36,658 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 23:33:36,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:33:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 23:33:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:33:36,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:36,659 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 23:33:36,659 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:36,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 49 times [2018-09-30 23:33:36,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:36,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:36,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:42,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:42,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:42,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:44,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:44,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:44,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-09-30 23:33:44,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:33:44,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:33:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=9900, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:33:44,233 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 101 states. [2018-09-30 23:33:44,591 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2018-09-30 23:33:44,932 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 9 [2018-09-30 23:33:45,274 WARN L178 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:33:45,634 WARN L178 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:33:45,992 WARN L178 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:33:46,349 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:33:46,707 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:33:47,063 WARN L178 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:33:47,436 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:33:47,816 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:33:48,186 WARN L178 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:33:48,556 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:33:48,927 WARN L178 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:33:49,281 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:33:49,685 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:33:50,092 WARN L178 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:33:50,474 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:33:50,873 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:33:51,293 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:33:51,707 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:33:52,127 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:33:52,528 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:33:52,962 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:33:53,385 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:33:53,804 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:33:54,243 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:33:54,654 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:33:55,096 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:33:55,512 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:33:55,935 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:33:56,377 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:33:56,785 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:33:57,208 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:33:57,631 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:33:58,049 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:33:58,458 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:33:58,888 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:33:59,302 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:33:59,705 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:34:00,110 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:34:00,511 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:34:00,900 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:34:01,299 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:34:01,685 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:34:02,070 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:34:02,465 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:34:02,859 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:34:03,251 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:34:03,648 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:34:04,046 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:34:04,434 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:34:05,187 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:34:05,574 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:34:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:17,596 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-09-30 23:34:17,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:34:17,597 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 198 [2018-09-30 23:34:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:17,598 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:34:17,598 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:34:17,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=9899, Invalid=29107, Unknown=0, NotChecked=0, Total=39006 [2018-09-30 23:34:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:34:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:34:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:34:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 23:34:17,608 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-09-30 23:34:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:17,608 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 23:34:17,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:34:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 23:34:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:34:17,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:17,609 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 23:34:17,609 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:17,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 50 times [2018-09-30 23:34:17,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:17,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:17,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:17,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:17,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:23,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:23,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:23,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:24,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:24,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:25,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:25,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:25,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-09-30 23:34:25,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:34:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:34:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=10302, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:34:25,494 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 103 states. [2018-09-30 23:34:25,858 WARN L178 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 8 [2018-09-30 23:34:26,213 WARN L178 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 9 [2018-09-30 23:34:26,554 WARN L178 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:34:26,916 WARN L178 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:34:27,304 WARN L178 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:34:27,663 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:34:28,023 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:34:28,394 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:34:28,780 WARN L178 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:34:29,165 WARN L178 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:34:29,559 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:34:29,943 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:34:30,334 WARN L178 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:34:30,706 WARN L178 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:34:31,147 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:34:31,554 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:34:31,970 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:34:32,401 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:34:32,823 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:34:33,256 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:34:33,682 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:34:34,108 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:34:34,546 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:34:34,963 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:34:35,387 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:34:35,815 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:34:36,256 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:34:36,701 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:34:37,149 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:34:37,586 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:34:38,030 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:34:38,463 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:34:38,915 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:34:39,362 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:34:39,797 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:34:40,230 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:34:40,644 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:34:41,068 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:34:41,486 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:34:41,905 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:34:42,322 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:34:42,738 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:34:43,149 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:34:43,550 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:34:43,923 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:34:44,357 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:34:44,773 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:34:45,196 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:34:45,621 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:34:46,041 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:34:46,446 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:34:46,860 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:34:47,246 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:34:47,675 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:34:48,064 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:35:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:00,527 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-09-30 23:35:00,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:35:00,528 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 202 [2018-09-30 23:35:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:00,530 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:35:00,530 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:35:00,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4852 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=10301, Invalid=30301, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:35:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:35:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 23:35:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:35:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 23:35:00,540 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-09-30 23:35:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:00,541 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 23:35:00,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:35:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 23:35:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:35:00,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:00,542 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 23:35:00,542 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:00,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 51 times [2018-09-30 23:35:00,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:00,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:00,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:00,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:00,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:06,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:06,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:06,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:06,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2018-09-30 23:35:06,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:06,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:06,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:06,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-09-30 23:35:06,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:35:06,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:35:06,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:35:06,652 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 105 states. [2018-09-30 23:35:07,042 WARN L178 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 8 [2018-09-30 23:35:07,402 WARN L178 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 9 [2018-09-30 23:35:07,780 WARN L178 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2018-09-30 23:35:08,187 WARN L178 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2018-09-30 23:35:08,562 WARN L178 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:35:08,964 WARN L178 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:35:09,361 WARN L178 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:35:09,739 WARN L178 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:35:10,132 WARN L178 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:35:10,529 WARN L178 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:35:10,942 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:35:11,338 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:35:11,735 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:35:12,148 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:35:12,572 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:35:13,031 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:35:13,455 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:35:13,882 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:35:14,320 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:35:14,757 WARN L178 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:35:15,185 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:35:15,622 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:35:16,053 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:35:16,498 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:35:16,938 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:35:17,399 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:35:17,851 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:35:18,314 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:35:18,769 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:35:19,252 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:35:19,717 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:35:20,166 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:35:20,621 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:35:21,082 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:35:21,530 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:35:21,971 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:35:22,415 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:35:22,862 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:35:23,319 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:35:23,758 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:35:24,184 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:35:24,610 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:35:25,037 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:35:25,460 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:35:26,159 WARN L178 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:35:26,599 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:35:27,024 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:35:27,451 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:35:27,883 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:35:28,308 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:35:28,751 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:35:29,184 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:35:29,611 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:35:30,019 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:35:30,446 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:35:30,861 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 23:35:32,093 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:35:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:44,212 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-09-30 23:35:44,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:35:44,212 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 206 [2018-09-30 23:35:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:44,213 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:35:44,213 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:35:44,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5051 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=10711, Invalid=31519, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:35:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:35:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:35:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:35:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 23:35:44,227 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-09-30 23:35:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:44,227 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 23:35:44,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:35:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 23:35:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:35:44,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:44,229 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 23:35:44,229 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:44,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 52 times [2018-09-30 23:35:44,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:44,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:44,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:44,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:44,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:50,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:50,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:50,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:51,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:51,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:52,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:52,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:52,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-09-30 23:35:52,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:35:52,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:35:52,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=11130, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:35:52,885 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 107 states. [2018-09-30 23:35:53,274 WARN L178 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 8 [2018-09-30 23:35:53,636 WARN L178 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 9 [2018-09-30 23:35:54,025 WARN L178 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2018-09-30 23:35:54,449 WARN L178 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2018-09-30 23:35:54,840 WARN L178 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2018-09-30 23:35:55,236 WARN L178 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2018-09-30 23:35:55,641 WARN L178 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:35:56,076 WARN L178 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:35:56,473 WARN L178 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:35:56,890 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:35:57,297 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:35:57,707 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:35:58,133 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:35:58,526 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:35:58,953 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:35:59,419 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:35:59,838 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:36:00,287 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:36:00,732 WARN L178 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:36:01,183 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:36:01,660 WARN L178 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:36:02,120 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:36:02,597 WARN L178 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:36:03,065 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:36:03,529 WARN L178 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:36:04,004 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:36:04,477 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:36:04,956 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:36:05,423 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:36:05,889 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:36:06,365 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:36:06,836 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:36:07,295 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:36:07,792 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:36:08,265 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:36:08,727 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:36:09,184 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:36:09,667 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:36:10,119 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:36:10,560 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:36:10,988 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:36:11,419 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:36:11,862 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:36:12,295 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:36:12,707 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:36:13,154 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:36:13,597 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:36:14,056 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:36:14,510 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:36:14,974 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:36:15,407 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:36:15,837 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:36:16,276 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:36:16,704 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:36:17,141 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:36:17,578 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:36:18,004 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:36:18,846 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 23:36:19,266 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 23:36:19,705 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 23:36:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:31,895 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-09-30 23:36:31,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:36:31,895 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 210 [2018-09-30 23:36:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:31,900 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:36:31,900 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:36:31,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=11129, Invalid=32761, Unknown=0, NotChecked=0, Total=43890 [2018-09-30 23:36:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:36:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 23:36:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:36:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 23:36:31,913 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-09-30 23:36:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:31,913 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 23:36:31,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:36:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 23:36:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:36:31,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:31,915 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 23:36:31,915 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:31,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 53 times [2018-09-30 23:36:31,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:31,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:31,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:31,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:31,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:38,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:38,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:38,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:36:39,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 106 check-sat command(s) [2018-09-30 23:36:39,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:39,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:39,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:39,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-09-30 23:36:39,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:36:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:36:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=11556, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:36:39,896 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 109 states. [2018-09-30 23:36:40,367 WARN L178 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 8 [2018-09-30 23:36:40,745 WARN L178 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 9 [2018-09-30 23:36:41,143 WARN L178 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2018-09-30 23:36:41,538 WARN L178 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2018-09-30 23:36:41,959 WARN L178 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2018-09-30 23:36:42,352 WARN L178 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2018-09-30 23:36:42,756 WARN L178 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2018-09-30 23:36:43,166 WARN L178 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2018-09-30 23:36:43,589 WARN L178 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2018-09-30 23:36:44,080 WARN L178 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2018-09-30 23:36:44,510 WARN L178 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2018-09-30 23:36:44,929 WARN L178 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2018-09-30 23:36:45,369 WARN L178 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2018-09-30 23:36:45,811 WARN L178 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2018-09-30 23:36:46,267 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2018-09-30 23:36:46,700 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2018-09-30 23:36:47,145 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2018-09-30 23:36:47,590 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2018-09-30 23:36:48,053 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2018-09-30 23:36:48,530 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2018-09-30 23:36:49,001 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2018-09-30 23:36:49,469 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2018-09-30 23:36:49,939 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2018-09-30 23:36:50,429 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2018-09-30 23:36:50,946 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2018-09-30 23:36:51,440 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2018-09-30 23:36:51,923 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2018-09-30 23:36:52,402 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-09-30 23:36:52,882 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-09-30 23:36:53,381 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-09-30 23:36:53,893 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-09-30 23:36:54,373 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-09-30 23:36:54,861 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 23:36:55,353 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 23:36:55,850 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 23:36:56,322 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 23:36:56,796 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 23:36:57,326 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 23:36:57,794 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 23:36:58,252 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 23:36:58,697 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 23:36:59,136 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 23:36:59,584 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 23:37:00,051 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 23:37:00,481 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 23:37:00,956 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 23:37:01,421 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 23:37:01,879 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 23:37:02,335 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 23:37:02,810 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 23:37:03,285 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 23:37:03,739 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 23:37:04,187 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 23:37:04,621 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 23:37:05,056 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 23:37:05,487 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 23:37:05,957 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 23:37:06,406 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 23:37:06,831 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 23:37:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:20,757 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2018-09-30 23:37:20,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:37:20,758 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 214 [2018-09-30 23:37:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:20,759 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:37:20,760 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:37:20,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5461 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=11555, Invalid=34027, Unknown=0, NotChecked=0, Total=45582 [2018-09-30 23:37:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:37:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 23:37:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:37:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 23:37:20,770 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-09-30 23:37:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:20,770 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 23:37:20,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:37:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 23:37:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:37:20,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:20,771 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 23:37:20,772 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:20,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 54 times [2018-09-30 23:37:20,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:20,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:20,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:20,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:20,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:37:26,552 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:37:26,556 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:37:26,557 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:37:26 BoogieIcfgContainer [2018-09-30 23:37:26,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:37:26,558 INFO L168 Benchmark]: Toolchain (without parser) took 794511.12 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -68.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 310.3 MB). Peak memory consumption was 242.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:37:26,558 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:37:26,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:37:26,558 INFO L168 Benchmark]: Boogie Preprocessor took 19.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:37:26,558 INFO L168 Benchmark]: RCFGBuilder took 286.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:37:26,559 INFO L168 Benchmark]: TraceAbstraction took 794161.34 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -68.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 289.1 MB). Peak memory consumption was 221.0 MB. Max. memory is 7.1 GB. [2018-09-30 23:37:26,559 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 286.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 794161.34 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -68.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 289.1 MB). Peak memory consumption was 221.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 38). Cancelled while BasicCegarLoop was analyzing trace of length 219 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 103 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 794.0s OverallTime, 55 OverallIterations, 108 TraceHistogramMax, 630.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 269 SDtfs, 0 SDslu, 5839 SDs, 0 SdLazy, 6052 SolverSat, 2809 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11502 GetRequests, 5778 SyntacticMatches, 0 SemanticMatches, 5724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97890 ImplicationChecksByTransitivity, 734.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred in iteration=54, 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: 0.4s AutomataMinimizationTime, 54 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 26.5s SatisfiabilityAnalysisTime, 127.5s InterpolantComputationTime, 11664 NumberOfCodeBlocks, 11664 NumberOfCodeBlocksAsserted, 1539 NumberOfCheckSat, 11557 ConstructedInterpolants, 0 QuantifiedInterpolants, 8258207 SizeOfPredicates, 106 NumberOfNonLiveVariables, 12137 ConjunctsInSsa, 2968 ConjunctsInUnsatCore, 107 InterpolantComputations, 1 PerfectInterpolantSequences, 0/402588 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.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-37-26-566.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-37-26-566.csv Completed graceful shutdown