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/array2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:40:21,967 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:40:21,969 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:40:21,981 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:40:21,982 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:40:21,983 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:40:21,984 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:40:21,986 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:40:21,987 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:40:21,988 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:40:21,989 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:40:22,014 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:40:22,028 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:40:22,029 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:40:22,029 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:40:22,030 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:40:22,030 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:40:22,030 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:40:22,031 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:40:22,031 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:40:22,031 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:40:22,031 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:40:22,031 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:40:22,032 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:40:22,032 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:40:22,032 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:40:22,032 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:40:22,032 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:40:22,032 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:40:22,033 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:40:22,033 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:40:22,033 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:40:22,033 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:40:22,033 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:40:22,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:40:22,034 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:40:22,034 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:40:22,034 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:40:22,034 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:40:22,034 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:40:22,035 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:40:22,035 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:40:22,076 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:40:22,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:40:22,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:40:22,101 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:40:22,101 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:40:22,102 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl [2018-10-02 11:40:22,103 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl' [2018-10-02 11:40:22,163 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:40:22,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:40:22,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:40:22,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:40:22,168 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:40:22,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:40:22,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:40:22,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:40:22,215 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:40:22,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:40:22,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:40:22,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:40:22,241 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:40:22,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:40:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:40:22,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:40:22,567 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:40:22,568 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:40:22 BoogieIcfgContainer [2018-10-02 11:40:22,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:40:22,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:40:22,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:40:22,572 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:40:22,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/2) ... [2018-10-02 11:40:22,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7583545 and model type array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:40:22, skipping insertion in model container [2018-10-02 11:40:22,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:40:22" (2/2) ... [2018-10-02 11:40:22,576 INFO L112 eAbstractionObserver]: Analyzing ICFG array2.i_3.bpl [2018-10-02 11:40:22,585 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:40:22,593 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:40:22,644 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:40:22,645 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:40:22,645 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:40:22,645 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:40:22,646 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:40:22,646 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:40:22,646 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:40:22,646 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:40:22,646 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:40:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:40:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:40:22,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,673 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:40:22,675 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 11:40:22,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:22,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,836 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:40:22,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:40:22,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:40:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:40:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:40:22,859 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:40:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:22,896 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 11:40:22,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:40:22,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 11:40:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:22,909 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:40:22,909 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:40:22,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:40:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:40:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:40:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:40:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:40:22,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 11:40:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:22,949 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:40:22,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:40:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:40:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:40:22,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,950 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 11:40:22,951 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 11:40:22,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:22,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-02 11:40:23,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:40:23,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:40:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:40:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:40:23,218 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-02 11:40:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,314 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:40:23,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:40:23,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:40:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,317 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:40:23,319 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:40:23,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:40:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:40:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:40:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:40:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:40:23,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 11:40:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,325 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:40:23,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:40:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:40:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:40:23,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,328 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 11:40:23,328 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-02 11:40:23,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:23,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:23,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:23,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:23,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:40:23,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:40:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:40:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:40:23,698 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-02 11:40:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,732 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:40:23,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:40:23,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:40:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,734 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:40:23,734 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:40:23,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:40:23,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:40:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:40:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:40:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:40:23,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 11:40:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,738 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:40:23,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:40:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:40:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:40:23,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,739 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 11:40:23,740 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-02 11:40:23,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:23,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:23,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:40:23,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:23,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:40:23,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:40:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:40:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:40:23,902 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-02 11:40:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,956 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:40:23,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:40:23,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 11:40:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,958 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:40:23,958 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:40:23,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:40:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:40:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:40:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:40:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:40:23,964 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 11:40:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,964 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:40:23,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:40:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:40:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:40:23,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,966 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 11:40:23,966 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-02 11:40:23,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:23,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:24,309 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:24,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:24,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:40:24,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:40:24,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:40:24,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:40:24,345 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-02 11:40:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,447 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:40:24,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:40:24,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 11:40:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,450 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:40:24,450 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:40:24,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:40:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:40:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:40:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:40:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:40:24,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 11:40:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,456 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:40:24,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:40:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:40:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:40:24,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,457 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 11:40:24,458 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-02 11:40:24,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:24,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:40:24,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:24,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:40:24,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:40:24,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:40:24,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:40:24,708 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-02 11:40:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,832 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:40:24,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:40:24,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 11:40:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,835 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:40:24,835 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:40:24,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:40:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:40:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:40:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:40:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:40:24,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 11:40:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,840 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:40:24,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:40:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:40:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:40:24,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,841 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 11:40:24,842 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-02 11:40:24,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:25,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:40:25,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:40:25,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:40:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:40:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:40:25,064 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-02 11:40:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,097 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:40:25,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:40:25,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:40:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,099 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:40:25,099 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:40:25,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:40:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:40:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:40:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:40:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:40:25,105 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 11:40:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,105 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:40:25,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:40:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:40:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:40:25,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,106 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 11:40:25,106 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,107 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-02 11:40:25,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:25,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:40:25,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:40:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:40:25,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:25,601 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-02 11:40:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,635 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:40:25,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:40:25,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:40:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,638 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:40:25,638 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:40:25,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:40:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:40:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:40:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:40:25,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 11:40:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,643 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:40:25,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:40:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:40:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:40:25,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,644 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 11:40:25,644 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,645 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-02 11:40:25,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:25,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:25,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:25,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:25,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:40:25,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:40:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:40:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:25,880 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-02 11:40:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,920 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:40:25,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:40:25,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 11:40:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,921 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:40:25,922 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:40:25,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:40:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:40:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:40:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:40:25,927 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 11:40:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,927 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:40:25,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:40:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:40:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:40:25,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,928 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 11:40:25,929 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-02 11:40:25,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:26,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:40:26,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:26,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:26,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:40:26,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:40:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:40:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:26,317 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-02 11:40:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:26,369 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:40:26,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:40:26,369 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 11:40:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:26,370 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:40:26,370 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:40:26,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:40:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:40:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:40:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:40:26,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 11:40:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:26,376 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:40:26,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:40:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:40:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:40:26,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:26,377 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 11:40:26,378 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:26,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-02 11:40:26,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:26,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:26,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:26,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:26,676 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:26,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:26,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:26,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:40:26,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:40:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:40:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:26,719 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-02 11:40:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:26,773 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:40:26,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:40:26,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 11:40:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:26,774 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:40:26,774 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:40:26,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:40:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:40:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:40:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:40:26,779 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 11:40:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:26,779 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:40:26,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:40:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:40:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:40:26,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:26,780 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 11:40:26,781 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:26,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:26,781 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-02 11:40:26,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:26,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:26,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:26,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:27,016 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:40:27,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:27,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:27,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:40:27,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:40:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:40:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:27,064 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-02 11:40:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:27,283 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:40:27,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:40:27,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 11:40:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:27,286 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:40:27,286 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:40:27,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:40:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:40:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:40:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:40:27,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 11:40:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:27,294 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:40:27,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:40:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:40:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:40:27,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:27,296 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 11:40:27,296 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:27,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-02 11:40:27,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:27,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:27,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:27,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:27,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:27,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:27,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:40:27,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:27,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:27,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:40:27,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:40:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:40:27,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:27,818 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-02 11:40:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,092 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:40:28,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:40:28,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 11:40:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,094 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:40:28,094 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:40:28,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:28,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:40:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:40:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:40:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:40:28,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 11:40:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,105 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:40:28,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:40:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:40:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:40:28,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,110 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 11:40:28,110 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-02 11:40:28,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:28,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:28,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:28,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:28,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:40:28,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:40:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:40:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:28,537 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-02 11:40:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,589 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:40:28,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:40:28,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 11:40:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,591 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:40:28,591 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:40:28,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:40:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:40:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:40:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:40:28,597 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 11:40:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,597 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:40:28,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:40:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:40:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:40:28,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,598 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 11:40:28,599 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-02 11:40:28,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:28,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:28,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:28,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:28,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:28,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:28,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:28,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:40:28,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:40:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:40:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:28,939 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-02 11:40:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,989 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:40:28,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:40:28,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 11:40:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,990 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:40:28,991 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:40:28,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:40:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:40:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:40:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:40:28,996 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 11:40:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,996 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:40:28,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:40:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:40:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:40:28,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,997 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 11:40:28,997 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-02 11:40:28,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:29,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:29,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:29,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:29,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:40:29,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:29,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:29,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:29,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:40:29,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:40:29,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:40:29,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:29,351 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-02 11:40:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:29,424 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:40:29,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:40:29,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 11:40:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:29,426 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:40:29,427 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:40:29,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:40:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:40:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:40:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:40:29,432 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-02 11:40:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:29,433 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:40:29,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:40:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:40:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:40:29,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:29,434 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-02 11:40:29,434 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:29,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-02 11:40:29,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:29,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:29,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:29,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:29,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:29,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:29,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:29,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:29,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:29,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:29,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:29,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:40:29,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:40:29,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:40:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:29,956 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-02 11:40:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:30,041 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:40:30,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:40:30,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 11:40:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:30,044 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:40:30,045 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:40:30,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:40:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:40:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:40:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:40:30,050 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-02 11:40:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:30,050 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:40:30,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:40:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:40:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:40:30,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:30,051 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 11:40:30,051 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:30,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-02 11:40:30,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:30,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:30,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:30,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:30,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:30,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:30,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:30,651 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:40:30,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:30,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:30,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:30,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:40:30,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:40:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:40:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:30,697 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-02 11:40:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:30,927 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:40:30,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:40:30,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 11:40:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:30,929 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:40:30,929 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:40:30,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:40:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:40:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:40:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:40:30,934 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-02 11:40:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:30,935 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:40:30,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:40:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:40:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:40:30,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:30,936 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-02 11:40:30,936 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:30,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-02 11:40:30,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:30,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:31,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:31,215 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:31,259 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:40:31,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:31,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:31,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:40:31,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:40:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:40:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:31,304 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-02 11:40:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:31,397 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:40:31,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:40:31,398 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-02 11:40:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:31,399 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:40:31,399 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:40:31,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:40:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:40:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:40:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:40:31,404 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-02 11:40:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:31,405 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:40:31,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:40:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:40:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:40:31,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:31,406 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-02 11:40:31,406 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:31,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-02 11:40:31,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:31,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:31,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:31,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:31,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:31,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:31,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:40:31,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:40:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:40:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:31,767 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-02 11:40:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:31,831 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:40:31,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:40:31,832 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 11:40:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:31,832 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:40:31,832 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:40:31,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:40:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:40:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:40:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:40:31,838 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-02 11:40:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:31,838 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:40:31,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:40:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:40:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:40:31,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:31,840 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-02 11:40:31,840 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:31,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-02 11:40:31,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:31,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:31,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:31,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:32,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:32,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:32,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:32,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:32,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:32,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:32,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:32,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:40:32,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:40:32,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:40:32,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:32,255 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-02 11:40:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:32,444 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:40:32,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:40:32,444 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-02 11:40:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:32,445 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:40:32,445 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:40:32,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:40:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:40:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:40:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:40:32,451 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-02 11:40:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:32,451 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:40:32,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:40:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:40:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:40:32,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:32,452 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-02 11:40:32,453 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:32,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-02 11:40:32,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:32,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:32,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:32,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:33,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:33,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:33,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:33,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:40:33,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:33,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:33,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:33,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:40:33,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:40:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:40:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:33,497 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-02 11:40:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:33,787 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:40:33,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:40:33,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 11:40:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:33,791 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:40:33,791 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:40:33,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:40:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:40:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:40:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:40:33,795 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-02 11:40:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:33,795 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:40:33,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:40:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:40:33,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:40:33,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:33,797 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-02 11:40:33,797 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:33,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-02 11:40:33,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:33,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:33,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:33,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:33,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:34,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:34,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:34,185 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:34,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:34,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:34,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:34,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:34,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:40:34,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:40:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:40:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:34,260 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-02 11:40:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:34,384 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:40:34,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:40:34,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-02 11:40:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:34,385 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:40:34,386 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:40:34,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:40:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:40:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:40:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:40:34,391 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-02 11:40:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:34,391 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:40:34,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:40:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:40:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:40:34,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:34,393 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-02 11:40:34,393 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:34,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-02 11:40:34,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:34,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:34,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:35,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:35,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:35,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:35,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:40:35,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:35,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:35,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:35,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:40:35,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:40:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:40:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:35,184 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-02 11:40:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:35,282 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:40:35,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:40:35,283 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 11:40:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:35,283 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:40:35,284 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:40:35,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:40:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:40:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:40:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:40:35,292 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-02 11:40:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:35,293 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:40:35,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:40:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:40:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:40:35,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:35,293 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-02 11:40:35,294 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:35,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-02 11:40:35,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:35,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:35,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:35,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:35,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:35,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:35,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:36,020 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:40:36,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:36,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:36,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:36,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:40:36,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:40:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:40:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:36,065 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-02 11:40:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:36,153 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:40:36,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:40:36,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-02 11:40:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:36,154 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:40:36,154 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:40:36,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:40:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:40:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:40:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:40:36,159 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-02 11:40:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:36,159 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:40:36,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:40:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:40:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:40:36,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:36,160 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-02 11:40:36,160 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:36,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:36,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-02 11:40:36,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:36,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:36,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:36,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:36,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:36,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:36,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:36,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:36,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:36,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:40:36,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:40:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:40:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:36,932 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-02 11:40:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:36,977 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:40:36,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:40:36,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 11:40:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:36,979 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:40:36,979 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:40:36,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:40:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:40:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:40:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:40:36,983 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-02 11:40:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:36,983 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:40:36,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:40:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:40:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:40:36,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:36,984 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-02 11:40:36,984 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:36,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-02 11:40:36,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:36,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:38,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:38,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:38,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:38,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:38,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:38,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:40:38,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:40:38,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:40:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:38,255 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-02 11:40:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:38,312 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:40:38,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:40:38,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-02 11:40:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:38,313 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:40:38,313 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:40:38,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:40:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:40:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:40:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:40:38,317 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-02 11:40:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:38,318 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:40:38,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:40:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:40:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:40:38,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:38,319 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-02 11:40:38,319 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:38,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-02 11:40:38,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:38,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:38,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:38,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:38,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:38,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:38,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:38,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:40:38,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:38,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:38,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:40:38,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:40:38,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:40:38,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:38,974 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-02 11:40:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:39,028 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:40:39,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:40:39,029 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 11:40:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:39,030 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:40:39,030 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:40:39,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:40:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:40:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:40:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:40:39,034 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-02 11:40:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:39,035 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:40:39,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:40:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:40:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:40:39,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:39,036 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-02 11:40:39,036 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:39,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-02 11:40:39,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:39,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:39,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:39,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:40,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:40,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:40,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:40,326 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:40,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:40,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:40,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:40,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:40:40,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:40:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:40:40,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:40,374 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-02 11:40:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:40,520 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:40:40,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:40:40,521 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-02 11:40:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:40,522 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:40:40,522 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:40:40,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:40:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:40:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:40:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:40:40,527 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-02 11:40:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:40,527 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:40:40,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:40:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:40:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:40:40,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:40,528 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-02 11:40:40,529 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:40,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-02 11:40:40,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:40,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:40,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:40,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:41,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:41,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:41,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:41,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:40:41,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:41,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:41,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:41,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:40:41,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:40:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:40:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:41,541 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-02 11:40:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:41,610 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:40:41,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:40:41,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 11:40:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:41,611 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:40:41,611 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:40:41,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:40:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:40:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:40:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 11:40:41,616 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-02 11:40:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 11:40:41,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:40:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 11:40:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:40:41,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:41,617 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-02 11:40:41,617 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:41,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-02 11:40:41,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:41,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:42,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:42,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:42,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:42,421 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:40:42,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:42,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:42,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:42,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:40:42,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:40:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:40:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:42,457 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-02 11:40:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:42,529 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:40:42,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:40:42,529 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-02 11:40:42,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:42,530 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:40:42,530 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:40:42,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:40:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:40:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:40:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:40:42,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-02 11:40:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:42,535 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:40:42,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:40:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:40:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:40:42,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:42,535 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-02 11:40:42,536 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:42,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-02 11:40:42,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:42,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:42,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:42,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:43,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:43,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:43,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:43,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:43,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:43,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:40:43,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:40:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:40:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:43,104 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-02 11:40:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:43,192 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:40:43,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:40:43,193 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 11:40:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:43,194 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:40:43,194 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:40:43,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:40:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:40:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:40:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 11:40:43,197 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-02 11:40:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:43,198 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 11:40:43,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:40:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 11:40:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:40:43,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:43,198 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-02 11:40:43,198 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:43,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-02 11:40:43,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:43,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:43,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:43,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:43,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:43,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:43,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:43,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:43,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:43,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:43,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:43,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:43,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:40:43,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:40:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:40:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:43,760 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-02 11:40:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:43,814 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:40:43,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:40:43,814 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-02 11:40:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:43,815 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:40:43,816 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:40:43,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:40:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:40:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:40:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:40:43,820 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-02 11:40:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:43,820 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:40:43,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:40:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:40:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:40:43,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:43,821 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-02 11:40:43,821 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:43,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-02 11:40:43,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:43,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:43,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:43,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:43,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:44,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:44,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:44,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:44,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:40:44,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:44,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:44,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:44,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:40:44,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:40:44,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:40:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:44,720 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-02 11:40:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:44,857 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:40:44,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:40:44,858 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 11:40:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:44,858 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:40:44,858 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:40:44,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:40:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:40:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:40:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 11:40:44,861 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-02 11:40:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:44,861 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 11:40:44,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:40:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 11:40:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:40:44,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:44,862 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-02 11:40:44,862 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:44,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-02 11:40:44,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:44,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:44,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:44,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:45,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:45,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:45,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:45,947 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:45,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:45,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:45,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:45,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:40:45,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:40:45,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:40:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:45,998 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-02 11:40:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:46,159 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:40:46,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:40:46,159 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-02 11:40:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:46,160 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:40:46,161 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:40:46,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:40:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:40:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:40:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:40:46,164 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-02 11:40:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:46,164 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:40:46,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:40:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:40:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:40:46,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:46,165 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-02 11:40:46,165 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:46,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-02 11:40:46,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:46,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:46,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:46,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:46,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:46,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:46,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:47,245 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:40:47,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:47,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:47,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:47,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:40:47,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:40:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:40:47,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:47,282 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-02 11:40:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:47,363 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:40:47,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:40:47,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 11:40:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:47,365 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:40:47,365 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:40:47,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:40:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:40:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:40:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 11:40:47,368 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-02 11:40:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:47,369 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 11:40:47,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:40:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 11:40:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:40:47,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:47,369 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-02 11:40:47,370 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:47,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-02 11:40:47,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:47,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:47,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:47,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:48,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:48,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:48,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:48,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:40:48,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:48,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:48,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:48,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:40:48,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:40:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:40:48,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:48,354 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-02 11:40:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:48,849 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:40:48,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:40:48,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-02 11:40:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:48,851 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:40:48,851 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:40:48,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:40:48,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:40:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:40:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:40:48,854 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-02 11:40:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:48,854 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:40:48,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:40:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:40:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:40:48,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:48,855 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-02 11:40:48,855 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:48,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:48,856 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-02 11:40:48,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:48,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:48,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:48,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:48,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:49,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:49,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:49,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:49,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:49,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:49,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:40:49,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:40:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:40:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:49,667 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-02 11:40:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:49,732 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:40:49,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:40:49,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 11:40:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:49,734 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:40:49,734 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:40:49,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:40:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:40:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:40:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 11:40:49,738 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-02 11:40:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:49,738 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 11:40:49,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:40:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 11:40:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:40:49,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:49,739 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-02 11:40:49,739 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:49,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-02 11:40:49,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:49,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:49,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:49,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:50,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:50,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:50,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:50,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:50,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:50,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:50,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:50,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:40:50,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:40:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:40:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:50,748 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-02 11:40:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:50,823 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:40:50,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:40:50,823 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-02 11:40:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:50,824 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:40:50,824 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:40:50,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:40:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:40:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:40:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:40:50,827 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-02 11:40:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:50,828 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:40:50,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:40:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:40:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:40:50,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:50,828 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-02 11:40:50,828 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:50,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-02 11:40:50,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:50,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:50,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:50,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:50,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:51,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:51,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:51,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:52,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:40:52,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:52,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:52,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:52,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:40:52,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:40:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:40:52,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:52,179 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-02 11:40:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:52,278 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:40:52,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:40:52,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 11:40:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:52,280 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:40:52,280 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:40:52,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:40:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:40:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:40:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 11:40:52,284 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-02 11:40:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:52,284 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 11:40:52,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:40:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 11:40:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:40:52,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:52,285 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-02 11:40:52,285 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:52,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-02 11:40:52,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:52,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:52,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:52,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:52,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:52,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:52,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:52,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:53,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:53,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:53,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:53,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:53,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:40:53,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:40:53,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:40:53,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:53,054 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-02 11:40:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:53,131 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:40:53,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:40:53,132 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-02 11:40:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:53,133 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:40:53,133 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:40:53,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:40:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:40:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:40:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:40:53,137 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-02 11:40:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:53,138 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:40:53,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:40:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:40:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:40:53,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:53,139 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-02 11:40:53,139 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:53,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-02 11:40:53,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:53,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:53,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:53,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:53,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:54,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:54,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:54,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:54,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:40:54,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:54,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:54,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:54,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:40:54,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:40:54,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:40:54,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:54,599 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-02 11:40:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:54,700 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:40:54,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:40:54,700 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 11:40:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:54,701 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:40:54,702 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:40:54,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:40:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:40:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:40:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 11:40:54,706 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-02 11:40:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:54,706 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 11:40:54,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:40:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 11:40:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:40:54,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:54,707 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-02 11:40:54,707 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:54,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-02 11:40:54,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:54,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:54,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:54,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:54,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:55,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:55,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:55,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:56,055 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:40:56,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:56,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:56,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:56,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:40:56,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:40:56,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:40:56,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:40:56,102 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-02 11:40:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:56,169 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:40:56,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:40:56,170 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-02 11:40:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:56,171 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:40:56,171 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:40:56,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:40:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:40:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:40:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:40:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:40:56,176 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-02 11:40:56,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:56,176 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:40:56,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:40:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:40:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:40:56,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:56,177 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-02 11:40:56,177 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:56,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-02 11:40:56,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:56,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:56,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:56,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:56,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:02,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:02,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:02,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:02,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:02,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:02,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:41:02,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:41:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:41:02,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:41:02,369 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-02 11:41:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:02,461 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:41:02,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:41:02,462 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 11:41:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:02,463 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:41:02,463 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:41:02,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:41:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:41:02,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:41:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:41:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 11:41:02,466 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-02 11:41:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:02,466 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 11:41:02,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:41:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 11:41:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:41:02,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:02,467 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-02 11:41:02,467 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:02,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:02,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-02 11:41:02,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:02,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:02,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:02,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:02,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:03,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:03,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:03,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:04,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:04,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:04,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:04,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:04,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:41:04,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:41:04,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:41:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:41:04,055 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-02 11:41:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:04,349 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:41:04,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:41:04,350 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-02 11:41:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:04,351 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:41:04,351 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:41:04,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:41:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:41:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:41:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:41:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:41:04,354 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-02 11:41:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:04,355 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:41:04,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:41:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:41:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:41:04,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:04,355 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-02 11:41:04,355 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:04,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-02 11:41:04,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:04,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:04,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:04,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:04,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:06,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:06,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:06,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:06,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:41:06,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:06,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:06,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:06,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:41:06,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:41:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:41:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:41:06,811 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-02 11:41:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:06,915 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:41:06,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:41:06,916 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 11:41:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:06,917 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:41:06,917 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:41:06,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:41:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:41:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:41:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:41:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 11:41:06,921 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-02 11:41:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:06,922 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 11:41:06,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:41:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 11:41:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:41:06,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:06,923 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-02 11:41:06,923 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:06,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-02 11:41:06,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:06,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:06,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:06,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:06,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:08,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:08,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:08,493 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:08,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:08,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:08,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:08,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:08,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:41:08,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:41:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:41:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:41:08,586 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-02 11:41:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:08,678 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:41:08,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:41:08,679 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-02 11:41:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:08,680 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:41:08,680 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:41:08,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:41:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:41:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:41:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:41:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:41:08,685 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-02 11:41:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:08,685 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:41:08,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:41:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:41:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:41:08,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:08,686 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-02 11:41:08,686 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:08,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:08,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-02 11:41:08,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:08,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:08,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:08,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:09,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:09,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:09,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:10,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:41:10,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:10,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:10,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:10,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:41:10,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:41:10,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:41:10,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:10,590 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-02 11:41:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:10,742 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:41:10,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:41:10,742 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 11:41:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:10,743 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:41:10,743 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:41:10,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:41:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:41:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:41:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 11:41:10,746 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-02 11:41:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:10,747 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 11:41:10,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:41:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 11:41:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:41:10,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:10,748 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-02 11:41:10,748 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:10,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-02 11:41:10,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:10,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:10,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:10,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:10,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:12,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:12,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:12,084 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:12,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:41:12,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:12,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:12,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:12,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:41:12,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:41:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:41:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:12,453 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-02 11:41:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:12,695 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:41:12,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:41:12,695 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-02 11:41:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:12,696 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:41:12,696 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:41:12,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:41:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:41:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:41:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:41:12,701 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-02 11:41:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:12,701 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:41:12,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:41:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:41:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:41:12,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:12,702 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-02 11:41:12,702 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:12,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-02 11:41:12,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:12,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:12,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:12,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:12,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:13,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:13,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:13,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:13,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:13,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:13,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:41:13,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:41:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:41:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:13,840 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-02 11:41:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:14,765 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:41:14,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:41:14,765 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 11:41:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:14,766 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:41:14,766 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:41:14,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:41:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:41:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:41:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 11:41:14,770 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-02 11:41:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:14,770 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 11:41:14,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:41:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 11:41:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:41:14,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:14,771 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-02 11:41:14,771 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:14,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:14,772 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-02 11:41:14,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:14,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:14,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:14,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:14,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:16,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:16,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:16,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:16,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:16,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:16,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:16,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:16,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:41:16,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:41:16,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:41:16,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:16,315 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-02 11:41:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:16,494 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:41:16,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:41:16,495 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-02 11:41:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:16,496 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:41:16,496 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:41:16,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:41:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:41:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:41:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:41:16,500 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-02 11:41:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:16,500 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:41:16,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:41:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:41:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:41:16,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:16,501 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-02 11:41:16,501 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:16,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-02 11:41:16,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:16,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:16,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:16,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:16,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:17,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:17,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:17,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:18,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:41:18,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:18,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:18,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:18,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:41:18,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:41:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:41:18,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:18,237 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-02 11:41:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:18,364 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:41:18,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:41:18,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 11:41:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:18,366 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:41:18,366 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:41:18,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:41:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:41:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:41:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 11:41:18,370 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-02 11:41:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:18,371 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 11:41:18,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:41:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 11:41:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:41:18,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:18,372 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-02 11:41:18,372 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:18,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:18,372 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-02 11:41:18,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:18,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:18,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:18,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:18,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:19,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:19,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:19,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:20,008 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:20,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:20,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:20,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:20,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:41:20,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:41:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:41:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:20,069 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-02 11:41:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:20,421 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:41:20,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:41:20,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-02 11:41:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:20,423 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:41:20,423 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:41:20,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:41:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:41:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:41:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:41:20,426 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-02 11:41:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:20,426 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:41:20,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:41:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:41:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:41:20,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:20,427 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-02 11:41:20,428 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:20,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-02 11:41:20,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:20,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:20,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:20,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:20,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:21,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:21,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:21,867 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:23,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:41:23,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:23,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:23,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:23,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:41:23,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:41:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:41:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:23,312 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-02 11:41:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:23,399 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:41:23,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:41:23,400 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 11:41:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:23,401 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:41:23,401 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:41:23,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:41:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:41:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:41:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-02 11:41:23,405 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-02 11:41:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:23,405 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-02 11:41:23,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:41:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-02 11:41:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:41:23,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:23,406 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-02 11:41:23,406 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:23,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-02 11:41:23,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:23,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:23,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:23,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:23,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:24,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:24,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:24,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:25,059 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:41:25,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:25,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:25,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:25,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:41:25,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:41:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:41:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:25,103 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-02 11:41:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:25,309 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:41:25,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:41:25,310 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-02 11:41:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:25,311 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:41:25,311 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:41:25,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:41:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:41:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:41:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 11:41:25,315 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-02 11:41:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:25,315 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 11:41:25,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:41:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 11:41:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:41:25,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:25,316 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-02 11:41:25,316 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:25,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-02 11:41:25,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:25,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:25,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:25,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:25,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:26,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:26,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:26,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:26,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:27,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:27,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:41:27,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:41:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:41:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:27,032 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-02 11:41:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:27,721 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 11:41:27,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:41:27,721 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 11:41:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:27,723 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:41:27,723 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:41:27,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:41:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 11:41:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 11:41:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-02 11:41:27,728 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-02 11:41:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:27,728 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-02 11:41:27,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:41:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-02 11:41:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:41:27,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:27,729 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-02 11:41:27,730 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:27,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:27,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-02 11:41:27,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:27,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:27,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:27,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:27,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:29,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:29,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:29,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:29,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:29,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:29,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:29,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:29,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:41:29,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:41:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:41:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:29,255 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-02 11:41:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:29,455 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 11:41:29,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:41:29,455 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-02 11:41:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:29,456 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:41:29,456 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:41:29,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:41:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:41:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:41:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-02 11:41:29,460 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-02 11:41:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:29,461 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-02 11:41:29,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:41:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-02 11:41:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:41:29,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:29,461 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-02 11:41:29,462 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:29,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-02 11:41:29,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:29,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:29,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:31,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:31,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:31,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:32,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:41:32,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:32,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:32,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:32,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:41:32,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:41:32,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:41:32,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:32,160 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-02 11:41:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:32,418 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 11:41:32,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:41:32,419 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-02 11:41:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:32,420 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:41:32,420 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 11:41:32,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 11:41:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 11:41:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 11:41:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-02 11:41:32,426 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-02 11:41:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:32,426 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-02 11:41:32,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:41:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-02 11:41:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 11:41:32,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:32,427 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-02 11:41:32,427 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:32,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:32,428 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-02 11:41:32,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:32,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:32,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:32,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:32,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:33,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:33,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:33,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:33,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:33,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:33,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:34,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:34,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:41:34,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:41:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:41:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:34,007 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-02 11:41:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:34,121 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 11:41:34,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:41:34,121 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-02 11:41:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:34,122 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:41:34,123 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:41:34,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:41:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 11:41:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:41:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-02 11:41:34,126 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-02 11:41:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:34,127 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-02 11:41:34,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:41:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-02 11:41:34,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:41:34,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:34,128 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-02 11:41:34,128 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:34,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:34,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-02 11:41:34,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:34,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:34,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:34,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:34,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:35,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:35,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:35,555 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:37,548 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:41:37,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:37,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:37,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:37,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:41:37,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:41:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:41:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:37,617 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-02 11:41:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:37,828 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 11:41:37,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:41:37,828 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-02 11:41:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:37,829 INFO L225 Difference]: With dead ends: 127 [2018-10-02 11:41:37,829 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 11:41:37,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 11:41:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 11:41:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 11:41:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-02 11:41:37,831 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-02 11:41:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:37,832 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-02 11:41:37,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:41:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-02 11:41:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 11:41:37,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:37,832 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-02 11:41:37,833 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:37,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-02 11:41:37,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:37,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:37,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:37,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:37,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:39,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:39,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:39,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:39,832 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:41:39,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:39,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:39,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:39,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:41:39,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:41:39,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:41:39,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:39,890 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-02 11:41:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:40,029 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 11:41:40,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:41:40,029 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-02 11:41:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:40,030 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:41:40,030 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:41:40,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:41:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:41:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:41:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-02 11:41:40,035 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-02 11:41:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:40,035 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-02 11:41:40,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:41:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-02 11:41:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:41:40,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:40,036 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-02 11:41:40,036 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:40,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-02 11:41:40,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:40,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:40,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:40,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:40,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:42,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:42,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:42,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:42,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:42,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:42,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:41:42,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:41:42,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:41:42,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:42,219 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-02 11:41:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:42,367 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 11:41:42,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:41:42,367 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-02 11:41:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:42,368 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:41:42,368 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 11:41:42,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 11:41:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 11:41:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:41:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-02 11:41:42,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-02 11:41:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:42,372 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-02 11:41:42,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:41:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-02 11:41:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:41:42,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:42,372 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-02 11:41:42,373 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:42,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-02 11:41:42,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:42,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:42,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:42,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:42,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:43,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:43,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:43,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:43,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:43,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:43,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:44,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:44,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:41:44,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:41:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:41:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:41:44,023 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-02 11:41:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:44,123 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 11:41:44,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:41:44,124 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-02 11:41:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:44,125 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:41:44,125 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:41:44,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:41:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:41:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:41:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:41:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-02 11:41:44,129 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-02 11:41:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:44,129 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-02 11:41:44,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:41:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-02 11:41:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:41:44,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:44,130 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-02 11:41:44,130 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:44,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-02 11:41:44,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:44,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:44,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:44,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:44,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:45,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:45,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:45,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:46,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:41:46,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:46,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:46,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:46,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:41:46,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:41:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:41:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:41:46,721 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-02 11:41:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:46,865 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 11:41:46,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:41:46,865 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-02 11:41:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:46,867 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:41:46,867 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:41:46,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:41:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:41:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 11:41:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:41:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-02 11:41:46,871 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-02 11:41:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:46,871 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-02 11:41:46,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:41:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-02 11:41:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 11:41:46,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:46,872 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-02 11:41:46,872 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:46,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-02 11:41:46,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:46,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:46,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:46,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:46,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:48,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:48,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:48,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:48,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:48,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:48,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:48,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:48,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:41:48,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:41:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:41:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:41:48,637 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-02 11:41:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:48,994 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 11:41:48,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:41:48,995 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-02 11:41:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:48,996 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:41:48,996 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:41:48,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:41:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:41:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 11:41:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:41:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-02 11:41:49,000 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-02 11:41:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:49,000 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-02 11:41:49,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:41:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-02 11:41:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:41:49,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:49,001 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-02 11:41:49,001 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:49,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-02 11:41:49,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:49,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:49,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:49,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:49,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:50,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:50,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:50,693 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:53,600 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:41:53,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:53,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:53,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:53,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:41:53,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:41:53,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:41:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:41:53,670 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-02 11:41:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:54,595 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 11:41:54,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:41:54,595 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-02 11:41:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:54,596 INFO L225 Difference]: With dead ends: 139 [2018-10-02 11:41:54,596 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:41:54,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:41:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:41:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 11:41:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 11:41:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-02 11:41:54,600 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-02 11:41:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:54,600 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-02 11:41:54,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:41:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-02 11:41:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 11:41:54,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:54,601 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-02 11:41:54,602 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:54,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-02 11:41:54,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:54,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:54,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:54,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:54,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:56,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:56,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:56,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:57,049 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:41:57,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:57,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:57,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:57,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:41:57,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:41:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:41:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:41:57,118 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-02 11:41:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:57,269 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 11:41:57,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:41:57,269 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-02 11:41:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:57,270 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:41:57,270 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:41:57,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:41:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:41:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:41:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:41:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-02 11:41:57,275 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-02 11:41:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:57,275 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-02 11:41:57,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:41:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-02 11:41:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:41:57,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:57,275 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-02 11:41:57,276 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:57,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-02 11:41:57,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:57,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:57,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:57,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:57,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:58,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:58,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:58,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:59,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:59,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:59,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:41:59,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:41:59,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:41:59,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:41:59,084 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-02 11:41:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:59,219 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 11:41:59,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:41:59,220 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-02 11:41:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:59,220 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:41:59,221 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 11:41:59,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:41:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 11:41:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 11:41:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 11:41:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-02 11:41:59,225 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-02 11:41:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:59,225 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-02 11:41:59,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:41:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-02 11:41:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:41:59,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:59,226 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-02 11:41:59,226 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:59,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-02 11:41:59,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:59,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:01,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:01,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:01,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:01,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:01,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:01,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:01,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:01,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:42:01,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:42:01,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:42:01,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:01,182 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-02 11:42:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:01,294 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 11:42:01,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:42:01,295 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-02 11:42:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:01,296 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:42:01,296 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:42:01,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:42:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:42:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:42:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-02 11:42:01,300 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-02 11:42:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:01,300 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-02 11:42:01,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:42:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-02 11:42:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:42:01,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:01,301 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-02 11:42:01,301 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:01,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-02 11:42:01,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:01,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:01,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:01,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:01,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:03,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:03,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:03,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:04,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:42:04,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:04,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:04,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:04,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:42:04,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:42:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:42:04,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:42:04,697 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-02 11:42:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:05,063 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 11:42:05,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:42:05,063 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-02 11:42:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:05,064 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:42:05,064 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 11:42:05,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:42:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 11:42:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 11:42:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 11:42:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-02 11:42:05,067 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-02 11:42:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:05,067 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-02 11:42:05,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:42:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-02 11:42:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 11:42:05,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:05,068 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-02 11:42:05,068 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:05,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:05,069 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-02 11:42:05,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:05,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:05,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:05,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:05,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:07,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:07,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:07,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:07,483 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:07,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:07,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:07,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:07,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:42:07,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:42:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:42:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:42:07,540 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-02 11:42:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:07,706 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 11:42:07,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:42:07,707 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-02 11:42:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:07,708 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:42:07,708 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:42:07,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:42:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:42:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 11:42:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:42:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-02 11:42:07,711 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-02 11:42:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:07,711 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-02 11:42:07,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:42:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-02 11:42:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:42:07,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:07,712 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-02 11:42:07,712 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:07,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-02 11:42:07,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:07,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:07,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:07,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:07,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:09,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:09,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:09,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:13,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:42:13,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:13,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:13,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:13,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:42:13,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:42:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:42:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:42:13,618 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-02 11:42:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:13,777 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 11:42:13,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:42:13,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-02 11:42:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:13,778 INFO L225 Difference]: With dead ends: 151 [2018-10-02 11:42:13,778 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 11:42:13,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:42:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 11:42:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-02 11:42:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:42:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-02 11:42:13,782 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-02 11:42:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:13,782 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-02 11:42:13,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:42:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-02 11:42:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 11:42:13,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:13,783 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-02 11:42:13,784 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:13,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-02 11:42:13,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:13,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:13,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:13,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:13,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:15,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:15,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:15,867 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:16,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 11:42:16,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:16,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:17,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:17,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:42:17,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:42:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:42:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:42:17,025 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-02 11:42:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:17,148 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 11:42:17,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:42:17,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-02 11:42:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:17,149 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:42:17,149 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:42:17,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:42:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:42:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 11:42:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:42:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-02 11:42:17,154 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-02 11:42:17,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:17,154 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-02 11:42:17,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:42:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-02 11:42:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:42:17,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:17,155 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-02 11:42:17,155 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:17,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:17,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-02 11:42:17,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:17,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:17,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:17,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:17,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:19,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:19,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:19,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:19,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:19,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:19,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:42:19,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:42:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:42:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:42:19,331 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-02 11:42:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:19,523 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 11:42:19,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:42:19,523 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-02 11:42:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:19,524 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:42:19,524 INFO L226 Difference]: Without dead ends: 153 [2018-10-02 11:42:19,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:42:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-02 11:42:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-02 11:42:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-02 11:42:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-02 11:42:19,528 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-02 11:42:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:19,528 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-02 11:42:19,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:42:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-02 11:42:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 11:42:19,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:19,529 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-02 11:42:19,529 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:19,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-02 11:42:19,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:19,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:19,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:19,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:19,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:21,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:21,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:21,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:21,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:21,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:21,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:21,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:21,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:42:21,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:42:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:42:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:42:21,776 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-02 11:42:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:22,039 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 11:42:22,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:42:22,040 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-02 11:42:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:22,041 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:42:22,041 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:42:22,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:42:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:42:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 11:42:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:42:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-02 11:42:22,045 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-02 11:42:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:22,045 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-02 11:42:22,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:42:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-02 11:42:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:42:22,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:22,046 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-02 11:42:22,046 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:22,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-02 11:42:22,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:22,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:22,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:22,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:22,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:24,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:24,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:24,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:25,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 11:42:25,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:25,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:26,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:26,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:42:26,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:42:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:42:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:42:26,014 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-02 11:42:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:26,236 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 11:42:26,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:42:26,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-02 11:42:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:26,237 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:42:26,237 INFO L226 Difference]: Without dead ends: 157 [2018-10-02 11:42:26,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:42:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-02 11:42:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-02 11:42:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 11:42:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-02 11:42:26,240 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-02 11:42:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:26,241 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-02 11:42:26,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:42:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-02 11:42:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-02 11:42:26,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:26,241 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-02 11:42:26,242 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:26,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:26,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-02 11:42:26,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:26,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:26,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:26,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:28,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:28,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:28,657 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:28,736 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:28,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:28,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:28,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:28,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:42:28,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:42:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:42:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:42:28,787 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-02 11:42:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:28,998 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 11:42:28,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:42:28,999 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-02 11:42:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:29,000 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:42:29,000 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:42:29,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:42:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:42:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-02 11:42:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:42:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-02 11:42:29,003 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-02 11:42:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:29,003 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-02 11:42:29,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 11:42:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-02 11:42:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:42:29,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:29,004 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-02 11:42:29,004 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:29,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-02 11:42:29,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:29,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:29,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:31,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:31,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:31,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:36,700 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 11:42:36,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:36,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:36,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:36,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:42:36,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:42:36,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:42:36,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:42:36,753 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-02 11:42:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:37,272 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-02 11:42:37,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:42:37,273 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-02 11:42:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:37,274 INFO L225 Difference]: With dead ends: 163 [2018-10-02 11:42:37,274 INFO L226 Difference]: Without dead ends: 161 [2018-10-02 11:42:37,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:42:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-02 11:42:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-02 11:42:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-02 11:42:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-02 11:42:37,278 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-02 11:42:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:37,278 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-02 11:42:37,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:42:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-02 11:42:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-02 11:42:37,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:37,279 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-02 11:42:37,279 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:37,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-02 11:42:37,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:37,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:37,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:37,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:37,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:39,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:39,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:39,883 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:41,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 11:42:41,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:41,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:41,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:41,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 11:42:41,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 11:42:41,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 11:42:41,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:42:41,389 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-02 11:42:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:41,537 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-02 11:42:41,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:42:41,537 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-02 11:42:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:41,539 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:42:41,539 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:42:41,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:42:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:42:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-02 11:42:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:42:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-02 11:42:41,544 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-02 11:42:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:41,544 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-02 11:42:41,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 11:42:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-02 11:42:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 11:42:41,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:41,545 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-02 11:42:41,545 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:41,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-02 11:42:41,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:41,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:41,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:41,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:41,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:44,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:44,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:44,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:44,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:44,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:44,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:42:44,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:42:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:42:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:42:44,316 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-02 11:42:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:44,550 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-02 11:42:44,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:42:44,551 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-02 11:42:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:44,552 INFO L225 Difference]: With dead ends: 167 [2018-10-02 11:42:44,552 INFO L226 Difference]: Without dead ends: 165 [2018-10-02 11:42:44,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:42:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-02 11:42:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-02 11:42:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-02 11:42:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-02 11:42:44,555 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-02 11:42:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:44,555 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-02 11:42:44,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:42:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-02 11:42:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 11:42:44,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:44,556 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-02 11:42:44,557 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:44,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-02 11:42:44,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:44,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:44,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:44,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:44,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:47,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:47,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:47,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:47,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:47,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:47,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:47,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:47,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 11:42:47,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:42:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:42:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:42:47,170 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-02 11:42:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:47,324 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-02 11:42:47,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:42:47,325 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-02 11:42:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:47,326 INFO L225 Difference]: With dead ends: 169 [2018-10-02 11:42:47,326 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:42:47,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:42:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:42:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-02 11:42:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:42:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-02 11:42:47,329 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-02 11:42:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:47,329 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-02 11:42:47,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:42:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-02 11:42:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 11:42:47,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:47,330 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-02 11:42:47,330 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:47,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-02 11:42:47,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:47,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:47,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:47,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:47,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:49,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:49,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:49,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:52,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-02 11:42:52,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:52,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:52,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:52,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:42:52,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:42:52,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:42:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:42:52,119 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-02 11:42:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:52,300 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-02 11:42:52,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:42:52,301 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-02 11:42:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:52,302 INFO L225 Difference]: With dead ends: 171 [2018-10-02 11:42:52,302 INFO L226 Difference]: Without dead ends: 169 [2018-10-02 11:42:52,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:42:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-02 11:42:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-02 11:42:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-02 11:42:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-02 11:42:52,306 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-02 11:42:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:52,306 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-02 11:42:52,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:42:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-02 11:42:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-02 11:42:52,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:52,307 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-02 11:42:52,307 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:52,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:52,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-02 11:42:52,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:52,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:52,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:55,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:55,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:55,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:55,177 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:55,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:55,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:55,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:55,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 11:42:55,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 11:42:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 11:42:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:42:55,250 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-02 11:42:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:55,520 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-02 11:42:55,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:42:55,520 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-02 11:42:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:55,521 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:42:55,521 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:42:55,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:42:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:42:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-02 11:42:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 11:42:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-02 11:42:55,524 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-02 11:42:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:55,524 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-02 11:42:55,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 11:42:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-02 11:42:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:42:55,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:55,525 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-02 11:42:55,525 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:55,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:55,526 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-02 11:42:55,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:55,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:55,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:55,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:55,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:58,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:58,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:58,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:05,867 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-02 11:43:05,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:05,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:05,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:05,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:43:05,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:43:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:43:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:05,926 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-02 11:43:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:06,207 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-02 11:43:06,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:43:06,208 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-02 11:43:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:06,208 INFO L225 Difference]: With dead ends: 175 [2018-10-02 11:43:06,209 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 11:43:06,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 11:43:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-02 11:43:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-02 11:43:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-02 11:43:06,213 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-02 11:43:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:06,213 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-02 11:43:06,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:43:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-02 11:43:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-02 11:43:06,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:06,215 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-02 11:43:06,215 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:06,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-02 11:43:06,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:06,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:06,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:06,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:06,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:09,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:09,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:09,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:11,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-02 11:43:11,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:11,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:11,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:11,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 11:43:11,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 11:43:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 11:43:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:43:11,327 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-02 11:43:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:11,699 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-02 11:43:11,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:43:11,699 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-02 11:43:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:11,701 INFO L225 Difference]: With dead ends: 177 [2018-10-02 11:43:11,701 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 11:43:11,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:43:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 11:43:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-02 11:43:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:43:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-02 11:43:11,705 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-02 11:43:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:11,705 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-02 11:43:11,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 11:43:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-02 11:43:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 11:43:11,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:11,706 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-02 11:43:11,707 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:11,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-02 11:43:11,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:11,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:11,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:11,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:11,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:14,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:14,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:14,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:14,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:14,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:14,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:43:14,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:43:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:43:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:43:14,898 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-02 11:43:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:15,162 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-02 11:43:15,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:43:15,162 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-02 11:43:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:15,163 INFO L225 Difference]: With dead ends: 179 [2018-10-02 11:43:15,163 INFO L226 Difference]: Without dead ends: 177 [2018-10-02 11:43:15,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:43:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-02 11:43:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-02 11:43:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-02 11:43:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-02 11:43:15,167 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-02 11:43:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:15,167 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-02 11:43:15,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:43:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-02 11:43:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-02 11:43:15,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:15,169 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-02 11:43:15,169 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:15,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-02 11:43:15,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:15,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:15,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:15,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:15,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:17,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:17,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:17,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:17,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:17,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:17,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:18,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:18,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 11:43:18,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:43:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:43:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:43:18,038 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-02 11:43:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:18,206 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-02 11:43:18,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:43:18,207 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-02 11:43:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:18,208 INFO L225 Difference]: With dead ends: 181 [2018-10-02 11:43:18,208 INFO L226 Difference]: Without dead ends: 179 [2018-10-02 11:43:18,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:43:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-02 11:43:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-02 11:43:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 11:43:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-02 11:43:18,211 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-02 11:43:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:18,211 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-02 11:43:18,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:43:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-02 11:43:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 11:43:18,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:18,212 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-02 11:43:18,212 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:18,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-02 11:43:18,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:18,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:18,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:18,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:21,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:21,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:24,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-02 11:43:24,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:24,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:24,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:24,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:43:24,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:43:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:43:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:43:24,129 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-02 11:43:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:24,413 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-02 11:43:24,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:43:24,413 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-02 11:43:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:24,414 INFO L225 Difference]: With dead ends: 183 [2018-10-02 11:43:24,414 INFO L226 Difference]: Without dead ends: 181 [2018-10-02 11:43:24,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:43:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-02 11:43:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-02 11:43:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-02 11:43:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-02 11:43:24,418 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-02 11:43:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:24,418 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-02 11:43:24,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:43:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-02 11:43:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-02 11:43:24,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:24,419 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-02 11:43:24,419 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:24,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-02 11:43:24,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:24,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:24,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:24,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:27,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:27,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:27,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:27,403 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:27,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:27,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:27,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:27,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 11:43:27,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 11:43:27,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 11:43:27,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:43:27,461 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-02 11:43:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:27,643 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-02 11:43:27,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:43:27,643 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-02 11:43:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:27,645 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:43:27,645 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:43:27,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:43:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:43:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-02 11:43:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-02 11:43:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-02 11:43:27,649 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-02 11:43:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:27,650 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-02 11:43:27,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 11:43:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-02 11:43:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:43:27,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:27,650 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-02 11:43:27,651 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:27,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-02 11:43:27,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:27,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:27,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:27,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:27,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:30,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:30,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:30,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:40,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-02 11:43:40,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:40,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:40,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:40,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 11:43:40,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:43:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:43:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:43:40,606 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-02 11:43:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:40,910 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-02 11:43:40,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 11:43:40,910 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-02 11:43:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:40,911 INFO L225 Difference]: With dead ends: 187 [2018-10-02 11:43:40,911 INFO L226 Difference]: Without dead ends: 185 [2018-10-02 11:43:40,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:43:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-02 11:43:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-02 11:43:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-02 11:43:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-02 11:43:40,914 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-02 11:43:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:40,914 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-02 11:43:40,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:43:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-02 11:43:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-02 11:43:40,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:40,915 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-02 11:43:40,915 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:40,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-02 11:43:40,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:40,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:40,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:40,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:40,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:44,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:44,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:44,041 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:46,413 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-02 11:43:46,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:46,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:46,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:46,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 11:43:46,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 11:43:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 11:43:46,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:43:46,477 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-02 11:43:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:46,716 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-02 11:43:46,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:43:46,717 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-02 11:43:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:46,718 INFO L225 Difference]: With dead ends: 189 [2018-10-02 11:43:46,718 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:43:46,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:43:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:43:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-02 11:43:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 11:43:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-02 11:43:46,722 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-02 11:43:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:46,723 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-02 11:43:46,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 11:43:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-02 11:43:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-02 11:43:46,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:46,724 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-02 11:43:46,724 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:46,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-02 11:43:46,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:46,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:50,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:50,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:50,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:50,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:50,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:50,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 11:43:50,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:43:50,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:43:50,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:43:50,252 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-02 11:43:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:50,443 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-02 11:43:50,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 11:43:50,444 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-02 11:43:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:50,445 INFO L225 Difference]: With dead ends: 191 [2018-10-02 11:43:50,445 INFO L226 Difference]: Without dead ends: 189 [2018-10-02 11:43:50,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:43:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-02 11:43:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-02 11:43:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-02 11:43:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-02 11:43:50,449 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-02 11:43:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:50,449 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-02 11:43:50,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:43:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-02 11:43:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:43:50,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:50,450 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-02 11:43:50,451 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:50,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-02 11:43:50,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:50,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:50,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:50,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:50,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:54,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:54,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:54,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:54,390 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:54,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:54,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:54,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:54,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 11:43:54,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 11:43:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 11:43:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:43:54,460 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-02 11:43:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:54,643 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-02 11:43:54,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:43:54,644 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-02 11:43:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:54,645 INFO L225 Difference]: With dead ends: 193 [2018-10-02 11:43:54,645 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 11:43:54,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:43:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 11:43:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-02 11:43:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 11:43:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-02 11:43:54,650 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-02 11:43:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:54,651 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-02 11:43:54,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 11:43:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-02 11:43:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-02 11:43:54,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:54,652 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-02 11:43:54,652 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:54,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:54,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-02 11:43:54,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:54,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:54,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:57,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:57,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:57,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:01,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-02 11:44:01,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:01,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:01,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:01,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 11:44:01,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:44:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:44:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:44:01,466 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-02 11:44:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:01,662 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-02 11:44:01,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 11:44:01,662 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-02 11:44:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:01,663 INFO L225 Difference]: With dead ends: 195 [2018-10-02 11:44:01,663 INFO L226 Difference]: Without dead ends: 193 [2018-10-02 11:44:01,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:44:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-02 11:44:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-02 11:44:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-02 11:44:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-02 11:44:01,667 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-02 11:44:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:01,667 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-02 11:44:01,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:44:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-02 11:44:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-02 11:44:01,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:01,668 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-02 11:44:01,668 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:01,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:01,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-02 11:44:01,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:01,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:01,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:01,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:01,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:05,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:05,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:05,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:05,321 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:05,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:05,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:05,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:05,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 11:44:05,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 11:44:05,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 11:44:05,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:44:05,400 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-02 11:44:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:05,691 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-02 11:44:05,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:44:05,691 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-02 11:44:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:05,692 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:44:05,693 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:44:05,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:44:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:44:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-02 11:44:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-02 11:44:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-02 11:44:05,697 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-02 11:44:05,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:05,698 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-02 11:44:05,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 11:44:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-02 11:44:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 11:44:05,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:05,699 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-02 11:44:05,699 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:05,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-02 11:44:05,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:05,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:05,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:05,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:05,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:08,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:08,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:08,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:22,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-02 11:44:22,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:22,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:22,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:22,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 11:44:22,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:44:22,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:44:22,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:44:22,156 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-02 11:44:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:22,480 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-02 11:44:22,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 11:44:22,481 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-02 11:44:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:22,482 INFO L225 Difference]: With dead ends: 199 [2018-10-02 11:44:22,482 INFO L226 Difference]: Without dead ends: 197 [2018-10-02 11:44:22,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:44:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-02 11:44:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-02 11:44:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-02 11:44:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-02 11:44:22,487 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-02 11:44:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:22,487 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-02 11:44:22,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:44:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-02 11:44:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-02 11:44:22,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:22,489 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-02 11:44:22,489 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:22,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-02 11:44:22,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:22,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:22,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:44:23,134 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:44:23,138 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:44:23,138 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:44:23 BoogieIcfgContainer [2018-10-02 11:44:23,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:44:23,139 INFO L168 Benchmark]: Toolchain (without parser) took 240975.35 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -2.1 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 152.0 MB). Peak memory consumption was 149.9 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:23,140 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:23,140 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:23,141 INFO L168 Benchmark]: Boogie Preprocessor took 25.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:23,141 INFO L168 Benchmark]: RCFGBuilder took 327.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:23,141 INFO L168 Benchmark]: TraceAbstraction took 240569.40 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -2.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 130.9 MB). Peak memory consumption was 128.8 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:23,143 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 0.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 327.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 240569.40 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -2.1 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 130.9 MB). Peak memory consumption was 128.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 197 with TraceHistMax 97, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 39 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 240.5s OverallTime, 97 OverallIterations, 97 TraceHistogramMax, 17.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 384 SDtfs, 0 SDslu, 7763 SDs, 0 SdLazy, 7859 SolverSat, 155 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14157 GetRequests, 9501 SyntacticMatches, 0 SemanticMatches, 4656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=197occurred in iteration=96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 96 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 75.0s SatisfiabilityAnalysisTime, 140.5s InterpolantComputationTime, 19004 NumberOfCodeBlocks, 19004 NumberOfCodeBlocksAsserted, 2511 NumberOfCheckSat, 18813 ConstructedInterpolants, 0 QuantifiedInterpolants, 7263531 SizeOfPredicates, 95 NumberOfNonLiveVariables, 33155 ConjunctsInSsa, 4750 ConjunctsInUnsatCore, 191 InterpolantComputations, 1 PerfectInterpolantSequences, 0/589760 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/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-44-23-151.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-44-23-151.csv Completed graceful shutdown