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/array3.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:40:17,051 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:40:17,053 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:40:17,065 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:40:17,065 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:40:17,066 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:40:17,068 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:40:17,070 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:40:17,071 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:40:17,072 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:40:17,073 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:40:17,073 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:40:17,074 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:40:17,075 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:40:17,076 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:40:17,077 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:40:17,078 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:40:17,080 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:40:17,082 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:40:17,084 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:40:17,085 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:40:17,086 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:40:17,092 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 08:40:17,110 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:40:17,139 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:40:17,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:40:17,142 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:40:17,142 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:40:17,142 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:40:17,143 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:40:17,143 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:40:17,143 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:40:17,143 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:40:17,144 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:40:17,144 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:40:17,144 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:40:17,145 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:40:17,145 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:40:17,146 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:40:17,146 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:40:17,146 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:40:17,146 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:40:17,146 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:40:17,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:40:17,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:40:17,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:40:17,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:40:17,147 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:40:17,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:40:17,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:40:17,148 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:40:17,148 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:40:17,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:40:17,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:40:17,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:40:17,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:40:17,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:40:17,231 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:40:17,232 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:40:17,233 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl [2018-10-03 08:40:17,233 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl' [2018-10-03 08:40:17,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:40:17,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:40:17,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:40:17,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:40:17,314 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:40:17,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:40:17,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:40:17,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:40:17,361 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:40:17,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... [2018-10-03 08:40:17,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:40:17,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:40:17,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:40:17,383 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:40:17,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:40:17,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:40:17,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:40:17,744 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:40:17,745 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:40:17 BoogieIcfgContainer [2018-10-03 08:40:17,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:40:17,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:40:17,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:40:17,750 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:40:17,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:17" (1/2) ... [2018-10-03 08:40:17,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766dc10 and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:40:17, skipping insertion in model container [2018-10-03 08:40:17,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:40:17" (2/2) ... [2018-10-03 08:40:17,753 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl [2018-10-03 08:40:17,763 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:40:17,771 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:40:17,822 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:40:17,822 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:40:17,823 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:40:17,823 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:40:17,823 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:40:17,823 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:40:17,823 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:40:17,824 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:40:17,824 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:40:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-03 08:40:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:40:17,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:17,844 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:40:17,846 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:17,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-03 08:40:17,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:17,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:17,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:17,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:40:17,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:40:18,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:40:18,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:40:18,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:40:18,019 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-03 08:40:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:18,121 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-03 08:40:18,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:40:18,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-03 08:40:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:18,158 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:40:18,158 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:40:18,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:40:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:40:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:40:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:40:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-03 08:40:18,216 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-10-03 08:40:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:18,216 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-03 08:40:18,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:40:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-03 08:40:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:40:18,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:18,217 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:40:18,217 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:18,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-03 08:40:18,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:18,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:18,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:18,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-03 08:40:18,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:18,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:18,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-03 08:40:18,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:18,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:40:18,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:40:18,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:40:18,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:40:18,394 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-03 08:40:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:18,572 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-03 08:40:18,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:40:18,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-03 08:40:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:18,574 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:40:18,575 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:40:18,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:40:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:40:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:40:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:40:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-03 08:40:18,586 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-03 08:40:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:18,586 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-03 08:40:18,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:40:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-03 08:40:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:40:18,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:18,587 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-03 08:40:18,587 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:18,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times [2018-10-03 08:40:18,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:18,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:18,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:18,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-03 08:40:18,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:18,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:18,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:18,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:18,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:18,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-03 08:40:18,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:18,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:40:18,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:40:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:40:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:40:18,815 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-03 08:40:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:18,882 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-03 08:40:18,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:40:18,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-03 08:40:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:18,883 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:40:18,883 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:40:18,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:40:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:40:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:40:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:40:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-03 08:40:18,889 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-03 08:40:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:18,890 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-03 08:40:18,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:40:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-03 08:40:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:40:18,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:18,891 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-03 08:40:18,892 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:18,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:18,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times [2018-10-03 08:40:18,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:18,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:18,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:18,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-03 08:40:19,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:19,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:19,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:19,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:40:19,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:19,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-03 08:40:19,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:19,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:40:19,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:40:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:40:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:40:19,186 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-10-03 08:40:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,351 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-03 08:40:19,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:40:19,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-03 08:40:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,352 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:40:19,353 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:40:19,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:40:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:40:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:40:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:40:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-03 08:40:19,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-10-03 08:40:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,360 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-03 08:40:19,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:40:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-03 08:40:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:40:19,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,361 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-03 08:40:19,361 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times [2018-10-03 08:40:19,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:19,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-03 08:40:19,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:19,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:19,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:19,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:19,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:19,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-03 08:40:19,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:19,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:40:19,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:40:19,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:40:19,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:40:19,587 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-10-03 08:40:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,660 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-03 08:40:19,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:40:19,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-03 08:40:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,664 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:40:19,664 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:40:19,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:40:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:40:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:40:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:40:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-03 08:40:19,671 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-10-03 08:40:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,671 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-03 08:40:19,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:40:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-03 08:40:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:40:19,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,673 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-03 08:40:19,673 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times [2018-10-03 08:40:19,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:19,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-03 08:40:19,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:19,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:19,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:19,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:40:19,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:19,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-03 08:40:19,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:19,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:40:19,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:40:19,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:40:19,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:40:19,976 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-10-03 08:40:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:20,056 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-03 08:40:20,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:40:20,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-03 08:40:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:20,058 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:40:20,058 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:40:20,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:40:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:40:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:40:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:40:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-03 08:40:20,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-03 08:40:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:20,065 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-03 08:40:20,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:40:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-03 08:40:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:40:20,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:20,067 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-03 08:40:20,067 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:20,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:20,067 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times [2018-10-03 08:40:20,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:20,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:20,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:20,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-03 08:40:20,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:20,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:20,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:20,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:40:20,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:20,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-03 08:40:20,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:20,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:40:20,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:40:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:40:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:40:20,521 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-10-03 08:40:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:20,784 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-10-03 08:40:20,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:40:20,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-03 08:40:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:20,786 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:40:20,786 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:40:20,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:40:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:40:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:40:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:40:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-03 08:40:20,793 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-10-03 08:40:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:20,793 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-03 08:40:20,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:40:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-03 08:40:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:40:20,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:20,795 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-03 08:40:20,795 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:20,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:20,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times [2018-10-03 08:40:20,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:20,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-03 08:40:20,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:20,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:21,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-03 08:40:21,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:21,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:40:21,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:40:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:40:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:40:21,064 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-10-03 08:40:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:21,130 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2018-10-03 08:40:21,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:40:21,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-03 08:40:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:21,136 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:40:21,136 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:40:21,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:40:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:40:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:40:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:40:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-03 08:40:21,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2018-10-03 08:40:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:21,149 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-03 08:40:21,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:40:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-03 08:40:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:40:21,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:21,153 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-03 08:40:21,153 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:21,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times [2018-10-03 08:40:21,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:21,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:21,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:21,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-03 08:40:21,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:21,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:21,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:21,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:21,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-03 08:40:21,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:21,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:40:21,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:40:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:40:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:40:21,688 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-10-03 08:40:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:21,773 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-10-03 08:40:21,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:40:21,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-03 08:40:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:21,774 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:40:21,775 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:40:21,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:40:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:40:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:40:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:40:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-03 08:40:21,781 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-10-03 08:40:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:21,782 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-03 08:40:21,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:40:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-03 08:40:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:40:21,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:21,784 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-03 08:40:21,784 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:21,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times [2018-10-03 08:40:21,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:21,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:21,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:21,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-03 08:40:21,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:21,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:22,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:40:22,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:22,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-03 08:40:22,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:22,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:40:22,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:40:22,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:40:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:40:22,111 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-10-03 08:40:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:22,225 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-10-03 08:40:22,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:40:22,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-10-03 08:40:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:22,226 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:40:22,226 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:40:22,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:40:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:40:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:40:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:40:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-03 08:40:22,233 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2018-10-03 08:40:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:22,233 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-03 08:40:22,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:40:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-03 08:40:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:40:22,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:22,235 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-03 08:40:22,235 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:22,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times [2018-10-03 08:40:22,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:22,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:22,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:22,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-03 08:40:22,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:22,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:22,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:22,511 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:22,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:22,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-03 08:40:22,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:22,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:40:22,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:40:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:40:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:40:22,570 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2018-10-03 08:40:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:22,820 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-03 08:40:22,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:40:22,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-03 08:40:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:22,823 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:40:22,823 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:40:22,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:40:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:40:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:40:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:40:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-03 08:40:22,829 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-10-03 08:40:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:22,829 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-03 08:40:22,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:40:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-03 08:40:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:40:22,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:22,831 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-03 08:40:22,831 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:22,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:22,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times [2018-10-03 08:40:22,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:22,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:22,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:22,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-03 08:40:22,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:22,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:23,008 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:23,053 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:40:23,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:23,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-03 08:40:23,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:40:23,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:40:23,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:40:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:40:23,092 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-10-03 08:40:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,174 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-10-03 08:40:23,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:40:23,174 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-10-03 08:40:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,175 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:40:23,175 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:40:23,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:40:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:40:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:40:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:40:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-03 08:40:23,182 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-10-03 08:40:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,183 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-03 08:40:23,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:40:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-03 08:40:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:40:23,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,184 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-03 08:40:23,184 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times [2018-10-03 08:40:23,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-03 08:40:23,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:23,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:23,470 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:23,525 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:40:23,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:23,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-03 08:40:23,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:40:23,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:40:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:40:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:40:23,575 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2018-10-03 08:40:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,676 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2018-10-03 08:40:23,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:40:23,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-03 08:40:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,678 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:40:23,678 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:40:23,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:40:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:40:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:40:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:40:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-03 08:40:23,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-10-03 08:40:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,685 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-03 08:40:23,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:40:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-03 08:40:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:40:23,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,686 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-03 08:40:23,687 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times [2018-10-03 08:40:23,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-03 08:40:23,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:23,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:23,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-03 08:40:23,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:40:23,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:40:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:40:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:40:23,981 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2018-10-03 08:40:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:24,162 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2018-10-03 08:40:24,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:40:24,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-10-03 08:40:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:24,163 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:40:24,163 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:40:24,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:40:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:40:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:40:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:40:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-03 08:40:24,171 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-10-03 08:40:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:24,171 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-03 08:40:24,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:40:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-03 08:40:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:40:24,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:24,173 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-03 08:40:24,173 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:24,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times [2018-10-03 08:40:24,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:24,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:24,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:24,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-03 08:40:24,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:24,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:24,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:24,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:24,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:24,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-03 08:40:24,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:24,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:40:24,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:40:24,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:40:24,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:40:24,575 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states. [2018-10-03 08:40:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:24,759 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-10-03 08:40:24,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:40:24,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-10-03 08:40:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:24,760 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:40:24,760 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:40:24,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:40:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:40:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:40:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:40:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-03 08:40:24,767 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-10-03 08:40:24,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:24,767 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-03 08:40:24,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:40:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-03 08:40:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:40:24,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:24,769 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-03 08:40:24,769 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:24,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times [2018-10-03 08:40:24,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:24,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:24,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:24,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-03 08:40:25,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:25,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:25,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:25,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:40:25,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:25,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-03 08:40:25,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:25,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:40:25,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:40:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:40:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:40:25,375 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2018-10-03 08:40:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:25,734 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-03 08:40:25,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:40:25,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-10-03 08:40:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:25,735 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:40:25,735 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:40:25,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:40:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:40:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:40:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:40:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-03 08:40:25,742 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-10-03 08:40:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:25,742 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-03 08:40:25,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:40:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-03 08:40:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:40:25,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:25,744 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-03 08:40:25,744 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:25,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:25,744 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times [2018-10-03 08:40:25,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:25,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:25,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:25,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-03 08:40:26,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:26,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:26,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:26,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:26,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:26,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-03 08:40:26,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:26,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:40:26,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:40:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:40:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:40:26,897 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states. [2018-10-03 08:40:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:27,077 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2018-10-03 08:40:27,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:40:27,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-03 08:40:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:27,078 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:40:27,078 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:40:27,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:40:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:40:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:40:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:40:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-03 08:40:27,083 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2018-10-03 08:40:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:27,084 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-03 08:40:27,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:40:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-03 08:40:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:40:27,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:27,084 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-03 08:40:27,085 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:27,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times [2018-10-03 08:40:27,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:27,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:27,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-10-03 08:40:27,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:27,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:27,771 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:27,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:40:27,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:27,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-10-03 08:40:27,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:27,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:40:27,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:40:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:40:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:40:27,928 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-10-03 08:40:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:28,026 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2018-10-03 08:40:28,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:40:28,026 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-10-03 08:40:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:28,027 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:40:28,028 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:40:28,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:40:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:40:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:40:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:40:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-03 08:40:28,033 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-10-03 08:40:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:28,033 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-03 08:40:28,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:40:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-03 08:40:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:40:28,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:28,034 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-03 08:40:28,034 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:28,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times [2018-10-03 08:40:28,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:28,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:28,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:28,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:28,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-03 08:40:28,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:28,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:28,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:28,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:40:28,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:28,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-03 08:40:28,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:28,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:40:28,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:40:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:40:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:40:28,469 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2018-10-03 08:40:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:28,589 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2018-10-03 08:40:28,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:40:28,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-10-03 08:40:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:28,591 INFO L225 Difference]: With dead ends: 123 [2018-10-03 08:40:28,591 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:40:28,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:40:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:40:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:40:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:40:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-03 08:40:28,597 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2018-10-03 08:40:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:28,597 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-03 08:40:28,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:40:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-03 08:40:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:40:28,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:28,598 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-03 08:40:28,598 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:28,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times [2018-10-03 08:40:28,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:28,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:28,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-03 08:40:28,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:28,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:29,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-03 08:40:29,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:29,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:40:29,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:40:29,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:40:29,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:40:29,093 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states. [2018-10-03 08:40:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:29,241 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2018-10-03 08:40:29,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:40:29,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-10-03 08:40:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:29,243 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:40:29,243 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:40:29,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:40:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:40:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:40:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:40:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-03 08:40:29,250 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2018-10-03 08:40:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:29,250 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-03 08:40:29,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:40:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-03 08:40:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:40:29,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:29,251 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-03 08:40:29,251 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:29,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times [2018-10-03 08:40:29,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:29,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:29,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:29,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-03 08:40:29,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:29,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:29,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:29,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:29,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:29,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-03 08:40:29,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:29,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:40:29,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:40:29,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:40:29,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:40:29,764 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states. [2018-10-03 08:40:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:29,902 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-03 08:40:29,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:40:29,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-10-03 08:40:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:29,903 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:40:29,903 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:40:29,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:40:29,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:40:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:40:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:40:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-03 08:40:29,907 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-10-03 08:40:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:29,908 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-03 08:40:29,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:40:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-03 08:40:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:40:29,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:29,908 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-03 08:40:29,909 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:29,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times [2018-10-03 08:40:29,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:29,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:29,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:29,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-03 08:40:30,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:30,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:30,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:30,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:40:30,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:30,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-03 08:40:30,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:30,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:40:30,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:40:30,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:40:30,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:40:30,585 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2018-10-03 08:40:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:30,764 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2018-10-03 08:40:30,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:40:30,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-10-03 08:40:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:30,765 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:40:30,765 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:40:30,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:40:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:40:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:40:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:40:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-03 08:40:30,769 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2018-10-03 08:40:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:30,769 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-03 08:40:30,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:40:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-03 08:40:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:40:30,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:30,770 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-03 08:40:30,771 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:30,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times [2018-10-03 08:40:30,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:30,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:30,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:30,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:30,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-03 08:40:31,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:31,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:31,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:31,320 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:31,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:31,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-03 08:40:31,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:31,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:40:31,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:40:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:40:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:40:31,361 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states. [2018-10-03 08:40:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:31,584 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2018-10-03 08:40:31,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:40:31,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-10-03 08:40:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:31,586 INFO L225 Difference]: With dead ends: 147 [2018-10-03 08:40:31,586 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:40:31,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:40:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:40:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:40:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:40:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-03 08:40:31,591 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2018-10-03 08:40:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:31,591 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-03 08:40:31,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:40:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-03 08:40:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:40:31,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:31,592 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-03 08:40:31,593 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:31,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times [2018-10-03 08:40:31,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:31,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:31,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:31,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:31,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-03 08:40:31,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:31,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:31,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:32,119 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:40:32,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:32,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-03 08:40:32,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:32,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:40:32,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:40:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:40:32,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:40:32,165 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states. [2018-10-03 08:40:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:32,259 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2018-10-03 08:40:32,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:40:32,259 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-10-03 08:40:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:32,260 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:40:32,260 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:40:32,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:40:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:40:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:40:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:40:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-03 08:40:32,265 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-10-03 08:40:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:32,265 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-03 08:40:32,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:40:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-03 08:40:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:40:32,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:32,266 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-03 08:40:32,267 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:32,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times [2018-10-03 08:40:32,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:32,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:32,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:32,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-10-03 08:40:32,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:32,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:32,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:33,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:40:33,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:33,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-10-03 08:40:33,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:33,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:40:33,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:40:33,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:40:33,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:40:33,062 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2018-10-03 08:40:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:33,238 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2018-10-03 08:40:33,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:40:33,239 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-10-03 08:40:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:33,240 INFO L225 Difference]: With dead ends: 159 [2018-10-03 08:40:33,240 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:40:33,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:40:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:40:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:40:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:40:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-03 08:40:33,245 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2018-10-03 08:40:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:33,246 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-03 08:40:33,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:40:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-03 08:40:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:40:33,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:33,246 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-03 08:40:33,247 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:33,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times [2018-10-03 08:40:33,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:33,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:33,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:33,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-10-03 08:40:33,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:33,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:33,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:33,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-10-03 08:40:33,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:33,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:40:33,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:40:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:40:33,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:40:33,983 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states. [2018-10-03 08:40:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:34,098 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-03 08:40:34,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:40:34,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-10-03 08:40:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:34,100 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:40:34,100 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:40:34,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:40:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:40:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:40:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:40:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-03 08:40:34,106 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2018-10-03 08:40:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:34,106 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-03 08:40:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:40:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-03 08:40:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:40:34,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:34,108 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-03 08:40:34,108 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:34,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times [2018-10-03 08:40:34,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:34,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:34,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:34,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-03 08:40:34,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:34,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:34,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:34,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:34,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:34,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-03 08:40:34,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:34,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:40:34,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:40:34,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:40:34,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:40:34,894 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states. [2018-10-03 08:40:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:35,082 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-10-03 08:40:35,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:40:35,084 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-10-03 08:40:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:35,085 INFO L225 Difference]: With dead ends: 171 [2018-10-03 08:40:35,085 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:40:35,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:40:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:40:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:40:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:40:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-03 08:40:35,088 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-10-03 08:40:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:35,089 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-03 08:40:35,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:40:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-03 08:40:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:40:35,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:35,090 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-03 08:40:35,090 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:35,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times [2018-10-03 08:40:35,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:35,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:35,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:35,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:35,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-10-03 08:40:35,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:35,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:35,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:35,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 08:40:35,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:35,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-10-03 08:40:35,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:35,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:40:35,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:40:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:40:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:40:35,834 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2018-10-03 08:40:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:36,040 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2018-10-03 08:40:36,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:40:36,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-10-03 08:40:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:36,042 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:40:36,042 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:40:36,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:40:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:40:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 08:40:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:40:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-03 08:40:36,047 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2018-10-03 08:40:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:36,047 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-03 08:40:36,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:40:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-03 08:40:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:40:36,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:36,047 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-03 08:40:36,048 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:36,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:36,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times [2018-10-03 08:40:36,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:36,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:36,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:36,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:36,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-03 08:40:36,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:36,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:36,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:36,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:36,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:36,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-03 08:40:36,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:36,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:40:36,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:40:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:40:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:40:36,840 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states. [2018-10-03 08:40:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:37,102 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2018-10-03 08:40:37,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:40:37,102 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-10-03 08:40:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:37,104 INFO L225 Difference]: With dead ends: 183 [2018-10-03 08:40:37,104 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:40:37,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:40:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:40:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-03 08:40:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:40:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-03 08:40:37,111 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2018-10-03 08:40:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:37,111 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-03 08:40:37,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:40:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-03 08:40:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:40:37,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:37,112 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-03 08:40:37,112 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:37,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times [2018-10-03 08:40:37,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:37,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:37,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:37,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-03 08:40:37,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:37,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:37,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:37,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-03 08:40:37,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:37,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-03 08:40:37,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:37,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:40:37,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:40:37,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:40:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:40:37,898 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states. [2018-10-03 08:40:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:38,017 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2018-10-03 08:40:38,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:40:38,018 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-10-03 08:40:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:38,019 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:40:38,019 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:40:38,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:40:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:40:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 08:40:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:40:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-03 08:40:38,024 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-10-03 08:40:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:38,025 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-03 08:40:38,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:40:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-03 08:40:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:40:38,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:38,026 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-03 08:40:38,026 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:38,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times [2018-10-03 08:40:38,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:38,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:38,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:38,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:38,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-03 08:40:38,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:38,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:38,588 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:38,766 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:40:38,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:38,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-03 08:40:38,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:38,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:40:38,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:40:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:40:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:40:38,824 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2018-10-03 08:40:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:39,032 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-03 08:40:39,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:40:39,032 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-10-03 08:40:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:39,034 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:40:39,034 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:40:39,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:40:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:40:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:40:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:40:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-03 08:40:39,041 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2018-10-03 08:40:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:39,041 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-03 08:40:39,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:40:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-03 08:40:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:40:39,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:39,042 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-03 08:40:39,043 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:39,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times [2018-10-03 08:40:39,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:39,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:39,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:39,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-10-03 08:40:40,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:40,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:40,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:40,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-10-03 08:40:40,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:40,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:40:40,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:40:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:40:40,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:40:40,256 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states. [2018-10-03 08:40:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:40,425 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-10-03 08:40:40,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:40:40,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-10-03 08:40:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:40,429 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:40:40,429 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:40:40,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:40:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:40:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-03 08:40:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:40:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-03 08:40:40,434 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-10-03 08:40:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:40,435 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-03 08:40:40,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:40:40,435 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-03 08:40:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:40:40,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:40,436 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-03 08:40:40,436 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:40,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times [2018-10-03 08:40:40,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:40,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:40,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:40,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:40,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-03 08:40:41,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:41,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:41,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:41,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:41,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:41,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-03 08:40:41,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:41,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:40:41,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:40:41,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:40:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:40:41,805 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states. [2018-10-03 08:40:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:41,961 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-10-03 08:40:41,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:40:41,962 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-10-03 08:40:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:41,963 INFO L225 Difference]: With dead ends: 207 [2018-10-03 08:40:41,963 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:40:41,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:40:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:40:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 08:40:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:40:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-03 08:40:41,968 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-10-03 08:40:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:41,968 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-03 08:40:41,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:40:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-03 08:40:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:40:41,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:41,970 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-03 08:40:41,970 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:41,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times [2018-10-03 08:40:41,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:41,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:41,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:41,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:41,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-10-03 08:40:42,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:42,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:42,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:42,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 08:40:42,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:42,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-10-03 08:40:43,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:43,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:40:43,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:40:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:40:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:40:43,012 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2018-10-03 08:40:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:43,415 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2018-10-03 08:40:43,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:40:43,416 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-10-03 08:40:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:43,417 INFO L225 Difference]: With dead ends: 213 [2018-10-03 08:40:43,417 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:40:43,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:40:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:40:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 08:40:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:40:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-03 08:40:43,422 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2018-10-03 08:40:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:43,423 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-03 08:40:43,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:40:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-03 08:40:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:40:43,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:43,424 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-03 08:40:43,424 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:43,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:43,424 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times [2018-10-03 08:40:43,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:43,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:43,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:43,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:43,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-03 08:40:44,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:44,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:44,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:44,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:44,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:44,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-03 08:40:44,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:44,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:40:44,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:40:44,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:40:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:40:44,112 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states. [2018-10-03 08:40:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:44,400 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-10-03 08:40:44,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:40:44,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-10-03 08:40:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:44,401 INFO L225 Difference]: With dead ends: 219 [2018-10-03 08:40:44,401 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:40:44,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:40:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:40:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-03 08:40:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:40:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-03 08:40:44,408 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2018-10-03 08:40:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:44,408 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-03 08:40:44,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:40:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-03 08:40:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:40:44,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:44,410 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-03 08:40:44,410 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:44,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times [2018-10-03 08:40:44,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:44,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:44,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:44,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-10-03 08:40:45,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:45,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:45,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:45,994 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-03 08:40:45,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:45,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-10-03 08:40:46,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:46,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:40:46,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:40:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:40:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:40:46,051 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states. [2018-10-03 08:40:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:46,451 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-03 08:40:46,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:40:46,452 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-10-03 08:40:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:46,453 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:40:46,453 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:40:46,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:40:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:40:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:40:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:40:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-03 08:40:46,459 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-10-03 08:40:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:46,459 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-03 08:40:46,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:40:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-03 08:40:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:40:46,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:46,460 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-03 08:40:46,461 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:46,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:46,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times [2018-10-03 08:40:46,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:46,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:46,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:46,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:46,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-10-03 08:40:47,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:47,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:47,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:47,805 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:40:47,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:47,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-10-03 08:40:47,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:47,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:40:47,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:40:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:40:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:40:47,864 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2018-10-03 08:40:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:48,066 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2018-10-03 08:40:48,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:40:48,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-10-03 08:40:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:48,067 INFO L225 Difference]: With dead ends: 231 [2018-10-03 08:40:48,068 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:40:48,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:40:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:40:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 08:40:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:40:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-03 08:40:48,074 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2018-10-03 08:40:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:48,074 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-03 08:40:48,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:40:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-03 08:40:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:40:48,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:48,075 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-03 08:40:48,075 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:48,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times [2018-10-03 08:40:48,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:48,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:48,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:48,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-10-03 08:40:48,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:48,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:48,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:48,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-10-03 08:40:48,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:48,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:40:48,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:40:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:40:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:40:48,987 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-10-03 08:40:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:50,116 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2018-10-03 08:40:50,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:40:50,116 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-10-03 08:40:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:50,118 INFO L225 Difference]: With dead ends: 237 [2018-10-03 08:40:50,118 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:40:50,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:40:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:40:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-03 08:40:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:40:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-03 08:40:50,123 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2018-10-03 08:40:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:50,123 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-03 08:40:50,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:40:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-03 08:40:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:40:50,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:50,124 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-03 08:40:50,125 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:50,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times [2018-10-03 08:40:50,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:50,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-03 08:40:51,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:51,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:51,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:51,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:51,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:51,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-03 08:40:51,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:51,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:40:51,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:40:51,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:40:51,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:40:51,201 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states. [2018-10-03 08:40:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:51,708 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2018-10-03 08:40:51,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:40:51,708 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-03 08:40:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:51,712 INFO L225 Difference]: With dead ends: 243 [2018-10-03 08:40:51,712 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:40:51,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:40:51,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:40:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 08:40:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:40:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-03 08:40:51,717 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-10-03 08:40:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:51,717 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-03 08:40:51,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:40:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-03 08:40:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:40:51,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:51,718 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-03 08:40:51,719 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:51,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times [2018-10-03 08:40:51,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:51,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:51,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:51,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:51,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-03 08:40:52,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:52,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:52,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:53,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-03 08:40:53,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:53,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-03 08:40:53,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:53,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:40:53,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:40:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:40:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:40:53,091 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states. [2018-10-03 08:40:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:53,273 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2018-10-03 08:40:53,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:40:53,273 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-10-03 08:40:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:53,275 INFO L225 Difference]: With dead ends: 249 [2018-10-03 08:40:53,275 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:40:53,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:40:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:40:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 08:40:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:40:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-03 08:40:53,280 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2018-10-03 08:40:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:53,281 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-03 08:40:53,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:40:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-03 08:40:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:40:53,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:53,282 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-03 08:40:53,282 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:53,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times [2018-10-03 08:40:53,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:53,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:53,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:53,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:53,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-10-03 08:40:54,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:54,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:54,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:54,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:54,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:54,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-10-03 08:40:54,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:54,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:40:54,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:40:54,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:40:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:40:54,696 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states. [2018-10-03 08:40:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:56,656 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-03 08:40:56,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:40:56,657 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-10-03 08:40:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:56,658 INFO L225 Difference]: With dead ends: 255 [2018-10-03 08:40:56,658 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:40:56,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:40:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:40:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:40:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:40:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-03 08:40:56,663 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2018-10-03 08:40:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:56,663 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-03 08:40:56,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:40:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-03 08:40:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:40:56,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:56,664 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-03 08:40:56,664 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:56,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times [2018-10-03 08:40:56,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:56,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:56,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:56,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:56,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-03 08:40:58,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:58,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:58,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:59,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-03 08:40:59,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:59,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-03 08:40:59,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:59,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:40:59,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:40:59,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:40:59,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:40:59,225 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states. [2018-10-03 08:40:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:59,408 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2018-10-03 08:40:59,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:40:59,409 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-10-03 08:40:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:59,411 INFO L225 Difference]: With dead ends: 261 [2018-10-03 08:40:59,411 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:40:59,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:40:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:40:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 08:40:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:40:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-03 08:40:59,417 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2018-10-03 08:40:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:59,417 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-03 08:40:59,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:40:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-03 08:40:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:40:59,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:59,418 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-03 08:40:59,419 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:59,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:59,419 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times [2018-10-03 08:40:59,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:59,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:59,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:59,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-10-03 08:41:00,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:00,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:00,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:00,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:41:00,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:00,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-10-03 08:41:00,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:00,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:41:00,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:41:00,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:41:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:41:00,811 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states. [2018-10-03 08:41:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:00,986 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2018-10-03 08:41:00,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:41:00,987 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-10-03 08:41:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:00,988 INFO L225 Difference]: With dead ends: 267 [2018-10-03 08:41:00,989 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:41:00,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:41:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:41:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-03 08:41:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:41:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-03 08:41:00,993 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2018-10-03 08:41:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:00,994 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-03 08:41:00,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:41:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-03 08:41:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:41:00,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:00,995 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-03 08:41:00,995 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:00,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times [2018-10-03 08:41:00,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:00,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:00,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-10-03 08:41:02,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:02,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:02,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:02,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-10-03 08:41:02,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:02,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:41:02,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:41:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:41:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:41:02,416 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states. [2018-10-03 08:41:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:02,640 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2018-10-03 08:41:02,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:41:02,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-10-03 08:41:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:02,642 INFO L225 Difference]: With dead ends: 273 [2018-10-03 08:41:02,642 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:41:02,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:41:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:41:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-03 08:41:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:41:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-03 08:41:02,647 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2018-10-03 08:41:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:02,647 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-03 08:41:02,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:41:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-03 08:41:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:41:02,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:02,648 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-03 08:41:02,648 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:02,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times [2018-10-03 08:41:02,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:02,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:02,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:02,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:02,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-03 08:41:03,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:03,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:03,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:03,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:03,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:03,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-03 08:41:03,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:03,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:41:03,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:41:03,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:41:03,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:41:03,651 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states. [2018-10-03 08:41:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:03,858 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2018-10-03 08:41:03,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:41:03,859 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-10-03 08:41:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:03,860 INFO L225 Difference]: With dead ends: 279 [2018-10-03 08:41:03,861 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:41:03,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:41:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:41:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 08:41:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:41:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-03 08:41:03,868 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2018-10-03 08:41:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:03,885 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-03 08:41:03,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:41:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-03 08:41:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:41:03,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:03,886 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-03 08:41:03,886 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:03,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times [2018-10-03 08:41:03,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:03,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:03,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:03,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:03,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-10-03 08:41:04,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:04,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:04,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:05,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-03 08:41:05,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:05,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-10-03 08:41:05,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:05,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:41:05,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:41:05,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:41:05,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:41:05,817 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states. [2018-10-03 08:41:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:06,147 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-10-03 08:41:06,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:41:06,147 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-10-03 08:41:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:06,149 INFO L225 Difference]: With dead ends: 285 [2018-10-03 08:41:06,149 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:41:06,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:41:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:41:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:41:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:41:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-03 08:41:06,155 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2018-10-03 08:41:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:06,155 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-03 08:41:06,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:41:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-03 08:41:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:41:06,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:06,156 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-03 08:41:06,157 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:06,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times [2018-10-03 08:41:06,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:06,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:06,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-10-03 08:41:07,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:07,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:07,770 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:07,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:07,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:07,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-10-03 08:41:07,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:07,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:41:07,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:41:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:41:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:41:07,905 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states. [2018-10-03 08:41:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:08,117 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2018-10-03 08:41:08,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:41:08,117 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-10-03 08:41:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:08,119 INFO L225 Difference]: With dead ends: 291 [2018-10-03 08:41:08,119 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:41:08,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:41:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:41:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-03 08:41:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:41:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-03 08:41:08,124 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2018-10-03 08:41:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:08,124 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-03 08:41:08,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:41:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-03 08:41:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:41:08,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:08,125 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-03 08:41:08,125 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:08,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times [2018-10-03 08:41:08,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:08,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:08,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:08,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:08,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-10-03 08:41:09,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:09,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:09,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:11,066 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-03 08:41:11,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:11,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-10-03 08:41:11,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:11,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:41:11,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:41:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:41:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:41:11,165 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states. [2018-10-03 08:41:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:11,421 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2018-10-03 08:41:11,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:41:11,422 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-10-03 08:41:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:11,423 INFO L225 Difference]: With dead ends: 297 [2018-10-03 08:41:11,423 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:41:11,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:41:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:41:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 08:41:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:41:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-03 08:41:11,429 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2018-10-03 08:41:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:11,429 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-03 08:41:11,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:41:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-03 08:41:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:41:11,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:11,431 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-03 08:41:11,431 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:11,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times [2018-10-03 08:41:11,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:11,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:11,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:11,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:11,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-10-03 08:41:12,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:12,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:12,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:13,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:41:13,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:13,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-10-03 08:41:13,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:13,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:41:13,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:41:13,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:41:13,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:41:13,665 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states. [2018-10-03 08:41:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:13,927 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2018-10-03 08:41:13,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:41:13,927 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-03 08:41:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:13,928 INFO L225 Difference]: With dead ends: 303 [2018-10-03 08:41:13,929 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:41:13,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:41:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:41:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-03 08:41:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 08:41:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-03 08:41:13,935 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-10-03 08:41:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:13,935 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-03 08:41:13,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:41:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-03 08:41:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:41:13,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:13,936 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-03 08:41:13,937 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:13,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times [2018-10-03 08:41:13,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:13,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:13,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:13,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-10-03 08:41:15,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:15,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:15,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:15,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-10-03 08:41:15,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:15,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:41:15,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:41:15,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:41:15,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:41:15,533 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states. [2018-10-03 08:41:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:15,863 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2018-10-03 08:41:15,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:41:15,863 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-10-03 08:41:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:15,865 INFO L225 Difference]: With dead ends: 309 [2018-10-03 08:41:15,865 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 08:41:15,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:41:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 08:41:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-03 08:41:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-03 08:41:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-10-03 08:41:15,871 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-10-03 08:41:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:15,872 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-10-03 08:41:15,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:41:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-10-03 08:41:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 08:41:15,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:15,873 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-10-03 08:41:15,873 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:15,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times [2018-10-03 08:41:15,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:15,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:15,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:15,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:15,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-10-03 08:41:17,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:17,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:17,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:17,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:17,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:17,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-10-03 08:41:17,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:17,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:41:17,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:41:17,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:41:17,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:41:17,792 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states. [2018-10-03 08:41:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:18,842 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-10-03 08:41:18,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:41:18,843 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-10-03 08:41:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:18,844 INFO L225 Difference]: With dead ends: 315 [2018-10-03 08:41:18,844 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:41:18,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:41:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:41:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 08:41:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 08:41:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-10-03 08:41:18,850 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2018-10-03 08:41:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:18,850 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-10-03 08:41:18,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:41:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-10-03 08:41:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-03 08:41:18,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:18,851 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-10-03 08:41:18,852 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:18,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times [2018-10-03 08:41:18,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:18,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:18,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:18,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:18,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-10-03 08:41:20,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:20,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:20,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:21,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 08:41:21,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:21,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-10-03 08:41:21,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:21,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:41:21,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:41:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:41:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:41:21,342 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states. [2018-10-03 08:41:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:21,730 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-10-03 08:41:21,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:41:21,731 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-10-03 08:41:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:21,732 INFO L225 Difference]: With dead ends: 321 [2018-10-03 08:41:21,732 INFO L226 Difference]: Without dead ends: 215 [2018-10-03 08:41:21,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:41:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-03 08:41:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-03 08:41:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-03 08:41:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-10-03 08:41:21,737 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2018-10-03 08:41:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:21,737 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-10-03 08:41:21,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:41:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-10-03 08:41:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-03 08:41:21,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:21,738 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-10-03 08:41:21,739 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:21,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times [2018-10-03 08:41:21,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:21,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:21,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-10-03 08:41:23,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:23,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:23,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:23,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:23,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:23,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-10-03 08:41:23,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:23,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:41:23,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:41:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:41:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:41:23,410 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states. [2018-10-03 08:41:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:23,683 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2018-10-03 08:41:23,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:41:23,684 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-10-03 08:41:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:23,685 INFO L225 Difference]: With dead ends: 327 [2018-10-03 08:41:23,685 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 08:41:23,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:41:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 08:41:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-03 08:41:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-03 08:41:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-03 08:41:23,691 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2018-10-03 08:41:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:23,691 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-03 08:41:23,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:41:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-03 08:41:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:41:23,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:23,693 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-10-03 08:41:23,693 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:23,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times [2018-10-03 08:41:23,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:23,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:23,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:23,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:23,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-10-03 08:41:25,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:25,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:25,045 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:26,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-03 08:41:26,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:26,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-10-03 08:41:26,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:26,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:41:26,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:41:26,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:41:26,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:41:26,987 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states. [2018-10-03 08:41:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:27,389 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2018-10-03 08:41:27,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:41:27,390 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-10-03 08:41:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:27,391 INFO L225 Difference]: With dead ends: 333 [2018-10-03 08:41:27,391 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 08:41:27,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:41:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 08:41:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-03 08:41:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-03 08:41:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-10-03 08:41:27,395 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2018-10-03 08:41:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:27,395 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-10-03 08:41:27,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:41:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-10-03 08:41:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-03 08:41:27,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:27,396 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-10-03 08:41:27,396 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:27,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times [2018-10-03 08:41:27,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:27,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:27,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-03 08:41:28,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:28,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:28,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:29,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:41:29,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:29,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-03 08:41:29,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:29,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:41:29,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:41:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:41:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:41:29,779 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states. [2018-10-03 08:41:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:30,154 INFO L93 Difference]: Finished difference Result 339 states and 342 transitions. [2018-10-03 08:41:30,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:41:30,155 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-10-03 08:41:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:30,156 INFO L225 Difference]: With dead ends: 339 [2018-10-03 08:41:30,156 INFO L226 Difference]: Without dead ends: 227 [2018-10-03 08:41:30,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:41:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-03 08:41:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-03 08:41:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-03 08:41:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-03 08:41:30,162 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2018-10-03 08:41:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:30,163 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-03 08:41:30,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:41:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-03 08:41:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-03 08:41:30,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:30,164 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-10-03 08:41:30,165 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:30,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:30,165 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times [2018-10-03 08:41:30,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:30,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:30,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:30,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:30,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-03 08:41:31,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:31,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:31,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:31,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-03 08:41:31,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:31,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:41:31,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:41:31,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:41:31,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:41:31,853 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states. [2018-10-03 08:41:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:32,158 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-10-03 08:41:32,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:41:32,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-10-03 08:41:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:32,159 INFO L225 Difference]: With dead ends: 345 [2018-10-03 08:41:32,160 INFO L226 Difference]: Without dead ends: 231 [2018-10-03 08:41:32,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:41:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-03 08:41:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-03 08:41:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-03 08:41:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-10-03 08:41:32,167 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2018-10-03 08:41:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:32,167 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-10-03 08:41:32,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:41:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-10-03 08:41:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-03 08:41:32,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:32,169 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-10-03 08:41:32,169 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:32,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times [2018-10-03 08:41:32,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:32,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:32,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:32,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:32,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-10-03 08:41:33,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:33,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:33,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:33,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:33,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:33,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-10-03 08:41:33,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:33,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:41:33,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:41:33,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:41:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:41:33,816 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states. [2018-10-03 08:41:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:35,058 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2018-10-03 08:41:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:41:35,058 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-10-03 08:41:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:35,060 INFO L225 Difference]: With dead ends: 351 [2018-10-03 08:41:35,060 INFO L226 Difference]: Without dead ends: 235 [2018-10-03 08:41:35,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:41:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-03 08:41:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-03 08:41:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-03 08:41:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-10-03 08:41:35,066 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2018-10-03 08:41:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:35,066 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-10-03 08:41:35,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:41:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-10-03 08:41:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-03 08:41:35,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:35,067 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-10-03 08:41:35,067 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:35,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times [2018-10-03 08:41:35,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:35,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:35,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-10-03 08:41:36,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:36,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:36,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:38,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-03 08:41:38,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:38,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-10-03 08:41:38,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:38,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:41:38,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:41:38,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:41:38,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:41:38,268 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states. [2018-10-03 08:41:38,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:38,812 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2018-10-03 08:41:38,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:41:38,812 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-10-03 08:41:38,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:38,814 INFO L225 Difference]: With dead ends: 357 [2018-10-03 08:41:38,814 INFO L226 Difference]: Without dead ends: 239 [2018-10-03 08:41:38,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:41:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-03 08:41:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-10-03 08:41:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-03 08:41:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-10-03 08:41:38,819 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2018-10-03 08:41:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:38,819 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-10-03 08:41:38,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:41:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-10-03 08:41:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-03 08:41:38,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:38,820 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-10-03 08:41:38,820 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:38,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times [2018-10-03 08:41:38,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:38,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:38,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:38,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:38,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-10-03 08:41:40,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:40,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:40,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:40,598 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:40,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:40,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-10-03 08:41:40,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:40,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:41:40,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:41:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:41:40,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:41:40,664 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states. [2018-10-03 08:41:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:41,019 INFO L93 Difference]: Finished difference Result 363 states and 366 transitions. [2018-10-03 08:41:41,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:41:41,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-10-03 08:41:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:41,021 INFO L225 Difference]: With dead ends: 363 [2018-10-03 08:41:41,021 INFO L226 Difference]: Without dead ends: 243 [2018-10-03 08:41:41,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:41:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-03 08:41:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-03 08:41:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-03 08:41:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-10-03 08:41:41,028 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2018-10-03 08:41:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:41,028 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-10-03 08:41:41,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:41:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-10-03 08:41:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-03 08:41:41,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:41,030 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-10-03 08:41:41,030 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:41,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:41,030 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times [2018-10-03 08:41:41,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:41,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:41,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:41,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:41,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-10-03 08:41:42,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:42,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:42,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:45,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-03 08:41:45,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:45,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-10-03 08:41:45,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:45,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:41:45,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:41:45,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:41:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:41:45,349 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states. [2018-10-03 08:41:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:45,804 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2018-10-03 08:41:45,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:41:45,804 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-10-03 08:41:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:45,806 INFO L225 Difference]: With dead ends: 369 [2018-10-03 08:41:45,806 INFO L226 Difference]: Without dead ends: 247 [2018-10-03 08:41:45,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:41:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-03 08:41:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-10-03 08:41:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-03 08:41:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-10-03 08:41:45,812 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2018-10-03 08:41:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:45,813 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-10-03 08:41:45,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:41:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-10-03 08:41:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-03 08:41:45,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:45,814 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-10-03 08:41:45,815 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:45,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times [2018-10-03 08:41:45,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:45,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:45,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:45,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:45,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-10-03 08:41:47,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:47,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:47,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:48,981 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-03 08:41:48,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:48,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-10-03 08:41:49,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:49,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:41:49,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:41:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:41:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:41:49,089 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states. [2018-10-03 08:41:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:49,491 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-10-03 08:41:49,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:41:49,492 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-10-03 08:41:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:49,494 INFO L225 Difference]: With dead ends: 375 [2018-10-03 08:41:49,494 INFO L226 Difference]: Without dead ends: 251 [2018-10-03 08:41:49,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:41:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-03 08:41:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-03 08:41:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-03 08:41:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-10-03 08:41:49,498 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2018-10-03 08:41:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:49,499 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-10-03 08:41:49,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:41:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-10-03 08:41:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-03 08:41:49,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:49,500 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-10-03 08:41:49,500 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:49,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times [2018-10-03 08:41:49,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:49,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:49,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:49,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:49,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-03 08:41:50,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:50,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:50,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:51,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-03 08:41:51,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:51,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:41:51,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:41:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:41:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:41:51,177 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states. [2018-10-03 08:41:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:51,546 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2018-10-03 08:41:51,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:41:51,546 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-10-03 08:41:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:51,548 INFO L225 Difference]: With dead ends: 381 [2018-10-03 08:41:51,548 INFO L226 Difference]: Without dead ends: 255 [2018-10-03 08:41:51,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:41:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-03 08:41:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-03 08:41:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-03 08:41:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-10-03 08:41:51,553 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2018-10-03 08:41:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:51,553 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-10-03 08:41:51,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:41:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-10-03 08:41:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-03 08:41:51,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:51,555 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-10-03 08:41:51,555 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:51,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times [2018-10-03 08:41:51,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:51,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:51,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:51,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:51,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-10-03 08:41:53,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:53,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:53,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:53,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:53,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:53,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-10-03 08:41:53,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:53,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:41:53,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:41:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:41:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:41:53,638 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states. [2018-10-03 08:41:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:54,197 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2018-10-03 08:41:54,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:41:54,198 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-10-03 08:41:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:54,199 INFO L225 Difference]: With dead ends: 387 [2018-10-03 08:41:54,200 INFO L226 Difference]: Without dead ends: 259 [2018-10-03 08:41:54,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:41:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-03 08:41:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-03 08:41:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-03 08:41:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-10-03 08:41:54,205 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2018-10-03 08:41:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:54,205 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-10-03 08:41:54,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:41:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-10-03 08:41:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-03 08:41:54,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:54,206 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-10-03 08:41:54,207 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:54,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times [2018-10-03 08:41:54,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:54,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:54,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:54,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:54,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-10-03 08:41:55,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:55,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:55,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:58,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-03 08:41:58,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:58,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-10-03 08:41:58,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:58,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:41:58,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:41:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:41:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:41:58,299 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states. [2018-10-03 08:41:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:58,826 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2018-10-03 08:41:58,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:41:58,826 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-10-03 08:41:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:58,827 INFO L225 Difference]: With dead ends: 393 [2018-10-03 08:41:58,827 INFO L226 Difference]: Without dead ends: 263 [2018-10-03 08:41:58,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:41:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-03 08:41:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-10-03 08:41:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-03 08:41:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-10-03 08:41:58,833 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2018-10-03 08:41:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:58,834 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-10-03 08:41:58,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:41:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-10-03 08:41:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-03 08:41:58,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:58,835 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-10-03 08:41:58,836 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:58,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times [2018-10-03 08:41:58,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:58,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:58,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:58,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:58,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-10-03 08:42:00,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:00,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:00,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:00,611 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:00,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:00,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-10-03 08:42:00,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:00,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:42:00,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:42:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:42:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:42:00,684 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states. [2018-10-03 08:42:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:01,204 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2018-10-03 08:42:01,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:42:01,204 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-10-03 08:42:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:01,206 INFO L225 Difference]: With dead ends: 399 [2018-10-03 08:42:01,206 INFO L226 Difference]: Without dead ends: 267 [2018-10-03 08:42:01,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:42:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-03 08:42:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-03 08:42:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-03 08:42:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-10-03 08:42:01,212 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2018-10-03 08:42:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:01,213 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-10-03 08:42:01,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:42:01,213 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-10-03 08:42:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-03 08:42:01,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:01,214 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-10-03 08:42:01,215 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:01,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:01,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times [2018-10-03 08:42:01,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:01,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:01,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:01,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:01,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-10-03 08:42:03,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:03,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:03,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:06,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-03 08:42:06,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:06,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-10-03 08:42:06,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:06,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:42:06,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:42:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:42:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:42:06,909 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states. [2018-10-03 08:42:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:07,486 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-10-03 08:42:07,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:42:07,487 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-10-03 08:42:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:07,489 INFO L225 Difference]: With dead ends: 405 [2018-10-03 08:42:07,489 INFO L226 Difference]: Without dead ends: 271 [2018-10-03 08:42:07,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:42:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-03 08:42:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-03 08:42:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-03 08:42:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-10-03 08:42:07,495 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-10-03 08:42:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:07,495 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-10-03 08:42:07,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:42:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-10-03 08:42:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-03 08:42:07,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:07,497 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-10-03 08:42:07,497 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:07,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:07,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times [2018-10-03 08:42:07,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:07,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:07,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:07,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:07,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-10-03 08:42:09,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:09,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:09,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:11,202 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-03 08:42:11,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:11,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-10-03 08:42:11,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:11,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:42:11,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:42:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:42:11,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:42:11,289 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states. [2018-10-03 08:42:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:11,881 INFO L93 Difference]: Finished difference Result 411 states and 414 transitions. [2018-10-03 08:42:11,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:42:11,881 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-10-03 08:42:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:11,883 INFO L225 Difference]: With dead ends: 411 [2018-10-03 08:42:11,883 INFO L226 Difference]: Without dead ends: 275 [2018-10-03 08:42:11,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:42:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-03 08:42:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-03 08:42:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-03 08:42:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-10-03 08:42:11,888 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-10-03 08:42:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:11,888 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-10-03 08:42:11,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:42:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-10-03 08:42:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-03 08:42:11,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:11,890 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-10-03 08:42:11,890 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:11,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:11,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times [2018-10-03 08:42:11,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:11,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:11,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:11,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:11,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-10-03 08:42:13,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:13,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:13,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:13,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-10-03 08:42:14,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:14,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:42:14,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:42:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:42:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:42:14,021 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states. [2018-10-03 08:42:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:14,695 INFO L93 Difference]: Finished difference Result 417 states and 420 transitions. [2018-10-03 08:42:14,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:42:14,695 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-10-03 08:42:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:14,697 INFO L225 Difference]: With dead ends: 417 [2018-10-03 08:42:14,697 INFO L226 Difference]: Without dead ends: 279 [2018-10-03 08:42:14,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:42:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-03 08:42:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-03 08:42:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-03 08:42:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-10-03 08:42:14,704 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2018-10-03 08:42:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:14,704 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-10-03 08:42:14,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:42:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-10-03 08:42:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-03 08:42:14,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:14,706 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-10-03 08:42:14,706 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:14,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times [2018-10-03 08:42:14,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:14,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:14,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:14,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:14,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-10-03 08:42:16,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:16,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:16,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:16,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:16,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:16,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-10-03 08:42:16,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:16,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:42:16,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:42:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:42:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:42:16,749 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states. [2018-10-03 08:42:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:17,234 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2018-10-03 08:42:17,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:42:17,235 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-03 08:42:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:17,237 INFO L225 Difference]: With dead ends: 423 [2018-10-03 08:42:17,237 INFO L226 Difference]: Without dead ends: 283 [2018-10-03 08:42:17,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:42:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-03 08:42:17,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-03 08:42:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-03 08:42:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-10-03 08:42:17,242 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2018-10-03 08:42:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:17,242 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-10-03 08:42:17,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:42:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-10-03 08:42:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-03 08:42:17,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:17,244 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-10-03 08:42:17,244 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:17,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times [2018-10-03 08:42:17,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:17,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:17,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:17,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:17,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-10-03 08:42:19,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:19,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:19,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:22,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 08:42:22,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:22,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-10-03 08:42:22,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:22,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:42:22,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:42:22,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:42:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:42:22,846 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states. [2018-10-03 08:42:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:23,384 INFO L93 Difference]: Finished difference Result 429 states and 432 transitions. [2018-10-03 08:42:23,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:42:23,384 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-10-03 08:42:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:23,385 INFO L225 Difference]: With dead ends: 429 [2018-10-03 08:42:23,385 INFO L226 Difference]: Without dead ends: 287 [2018-10-03 08:42:23,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:42:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-03 08:42:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-10-03 08:42:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-03 08:42:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-10-03 08:42:23,389 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2018-10-03 08:42:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:23,390 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-10-03 08:42:23,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:42:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-10-03 08:42:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-03 08:42:23,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:23,391 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-10-03 08:42:23,391 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:23,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times [2018-10-03 08:42:23,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:23,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:23,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-10-03 08:42:25,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:25,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:25,490 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:25,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:25,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:25,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-10-03 08:42:25,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:25,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:42:25,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:42:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:42:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:42:25,691 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states. [2018-10-03 08:42:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:26,413 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-10-03 08:42:26,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:42:26,414 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-10-03 08:42:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:26,415 INFO L225 Difference]: With dead ends: 435 [2018-10-03 08:42:26,415 INFO L226 Difference]: Without dead ends: 291 [2018-10-03 08:42:26,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:42:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-03 08:42:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-03 08:42:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-03 08:42:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-10-03 08:42:26,420 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2018-10-03 08:42:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:26,421 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-10-03 08:42:26,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:42:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-10-03 08:42:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-03 08:42:26,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:26,422 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-10-03 08:42:26,422 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:26,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times [2018-10-03 08:42:26,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:26,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:26,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:26,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:26,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-10-03 08:42:28,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:28,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:28,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:33,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-03 08:42:33,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:33,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-10-03 08:42:33,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:33,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:42:33,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:42:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:42:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:42:33,739 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states. [2018-10-03 08:42:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:34,443 INFO L93 Difference]: Finished difference Result 441 states and 444 transitions. [2018-10-03 08:42:34,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:42:34,443 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-10-03 08:42:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:34,445 INFO L225 Difference]: With dead ends: 441 [2018-10-03 08:42:34,445 INFO L226 Difference]: Without dead ends: 295 [2018-10-03 08:42:34,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:42:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-03 08:42:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-03 08:42:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-03 08:42:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-10-03 08:42:34,454 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2018-10-03 08:42:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:34,454 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-10-03 08:42:34,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:42:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-10-03 08:42:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-03 08:42:34,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:34,456 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-10-03 08:42:34,456 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:34,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times [2018-10-03 08:42:34,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:34,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:34,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:34,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:34,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-10-03 08:42:36,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:36,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:36,506 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:39,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-03 08:42:39,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:39,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-10-03 08:42:39,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:39,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:42:39,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:42:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:42:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:42:39,499 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states. [2018-10-03 08:42:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:40,202 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2018-10-03 08:42:40,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:42:40,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-10-03 08:42:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:40,205 INFO L225 Difference]: With dead ends: 447 [2018-10-03 08:42:40,205 INFO L226 Difference]: Without dead ends: 299 [2018-10-03 08:42:40,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:42:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-03 08:42:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-03 08:42:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-03 08:42:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-10-03 08:42:40,212 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2018-10-03 08:42:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:40,212 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-10-03 08:42:40,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:42:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-10-03 08:42:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-03 08:42:40,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:40,214 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-10-03 08:42:40,214 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:40,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times [2018-10-03 08:42:40,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:40,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:40,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:40,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:40,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-10-03 08:42:42,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:42,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:42,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:42,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-10-03 08:42:42,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:42,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:42:42,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:42:42,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:42:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:42:42,444 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states. [2018-10-03 08:42:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:43,060 INFO L93 Difference]: Finished difference Result 453 states and 456 transitions. [2018-10-03 08:42:43,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:42:43,061 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-10-03 08:42:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:43,063 INFO L225 Difference]: With dead ends: 453 [2018-10-03 08:42:43,063 INFO L226 Difference]: Without dead ends: 303 [2018-10-03 08:42:43,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:42:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-03 08:42:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-10-03 08:42:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-03 08:42:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-10-03 08:42:43,069 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2018-10-03 08:42:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:43,069 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-10-03 08:42:43,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:42:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-10-03 08:42:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-03 08:42:43,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:43,070 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-10-03 08:42:43,070 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:43,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times [2018-10-03 08:42:43,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:43,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:43,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:43,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:43,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-10-03 08:42:45,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:45,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:45,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:45,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:45,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:45,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-10-03 08:42:45,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:45,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:42:45,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:42:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:42:45,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:42:45,678 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states. [2018-10-03 08:42:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:46,413 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-10-03 08:42:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:42:46,413 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-10-03 08:42:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:46,415 INFO L225 Difference]: With dead ends: 459 [2018-10-03 08:42:46,415 INFO L226 Difference]: Without dead ends: 307 [2018-10-03 08:42:46,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:42:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-03 08:42:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-03 08:42:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-03 08:42:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-10-03 08:42:46,422 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2018-10-03 08:42:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:46,422 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-10-03 08:42:46,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:42:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-10-03 08:42:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-03 08:42:46,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:46,424 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-10-03 08:42:46,424 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:46,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times [2018-10-03 08:42:46,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:46,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:46,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:46,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:46,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-10-03 08:42:48,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:48,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:48,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:53,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-03 08:42:53,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:53,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-10-03 08:42:53,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:53,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:42:53,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:42:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:42:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:42:53,414 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states. [2018-10-03 08:42:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:54,201 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2018-10-03 08:42:54,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:42:54,201 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-10-03 08:42:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:54,202 INFO L225 Difference]: With dead ends: 465 [2018-10-03 08:42:54,202 INFO L226 Difference]: Without dead ends: 311 [2018-10-03 08:42:54,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:42:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-03 08:42:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-10-03 08:42:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-03 08:42:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-10-03 08:42:54,207 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2018-10-03 08:42:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:54,207 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-10-03 08:42:54,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:42:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-10-03 08:42:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-03 08:42:54,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:54,208 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-10-03 08:42:54,208 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:54,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times [2018-10-03 08:42:54,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:54,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:54,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:54,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-10-03 08:42:56,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:56,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:56,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:56,583 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:56,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:56,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-10-03 08:42:56,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:56,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:42:56,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:42:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:42:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:42:56,669 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states. [2018-10-03 08:42:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:57,529 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2018-10-03 08:42:57,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:42:57,529 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-10-03 08:42:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:57,531 INFO L225 Difference]: With dead ends: 471 [2018-10-03 08:42:57,531 INFO L226 Difference]: Without dead ends: 315 [2018-10-03 08:42:57,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:42:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-03 08:42:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-03 08:42:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-03 08:42:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-10-03 08:42:57,537 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2018-10-03 08:42:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:57,537 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-10-03 08:42:57,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:42:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-10-03 08:42:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-03 08:42:57,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:57,538 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-10-03 08:42:57,539 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:57,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times [2018-10-03 08:42:57,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:57,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:57,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:57,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-10-03 08:43:00,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:00,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:00,119 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:09,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-03 08:43:09,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:09,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-10-03 08:43:09,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:09,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:43:09,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:43:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:43:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:43:09,994 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states. [2018-10-03 08:43:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:10,851 INFO L93 Difference]: Finished difference Result 477 states and 480 transitions. [2018-10-03 08:43:10,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:43:10,852 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-10-03 08:43:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:10,854 INFO L225 Difference]: With dead ends: 477 [2018-10-03 08:43:10,854 INFO L226 Difference]: Without dead ends: 319 [2018-10-03 08:43:10,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:43:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-03 08:43:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-10-03 08:43:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-03 08:43:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-10-03 08:43:10,859 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2018-10-03 08:43:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:10,860 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-10-03 08:43:10,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:43:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-10-03 08:43:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-03 08:43:10,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:10,861 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-10-03 08:43:10,861 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:10,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times [2018-10-03 08:43:10,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:10,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:10,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-10-03 08:43:13,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:13,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:13,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:16,604 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-03 08:43:16,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:16,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-10-03 08:43:16,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:16,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:43:16,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:43:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:43:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:43:16,706 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states. [2018-10-03 08:43:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:17,431 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2018-10-03 08:43:17,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:43:17,432 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-10-03 08:43:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:17,434 INFO L225 Difference]: With dead ends: 483 [2018-10-03 08:43:17,434 INFO L226 Difference]: Without dead ends: 323 [2018-10-03 08:43:17,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:43:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-03 08:43:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-03 08:43:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-03 08:43:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-10-03 08:43:17,439 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2018-10-03 08:43:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:17,439 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-10-03 08:43:17,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:43:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-10-03 08:43:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-03 08:43:17,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:17,441 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-10-03 08:43:17,441 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:17,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times [2018-10-03 08:43:17,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:17,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:17,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:17,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-10-03 08:43:19,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:19,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:20,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:20,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-10-03 08:43:20,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:20,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:43:20,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:43:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:43:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:43:20,228 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states. [2018-10-03 08:43:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:21,234 INFO L93 Difference]: Finished difference Result 489 states and 492 transitions. [2018-10-03 08:43:21,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:43:21,234 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-10-03 08:43:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:21,236 INFO L225 Difference]: With dead ends: 489 [2018-10-03 08:43:21,236 INFO L226 Difference]: Without dead ends: 327 [2018-10-03 08:43:21,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:43:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-03 08:43:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-10-03 08:43:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-10-03 08:43:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-10-03 08:43:21,242 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2018-10-03 08:43:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:21,242 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-10-03 08:43:21,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:43:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-10-03 08:43:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-03 08:43:21,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:21,243 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-10-03 08:43:21,244 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:21,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times [2018-10-03 08:43:21,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:21,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:21,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:21,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-10-03 08:43:23,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:23,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:23,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:23,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:23,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:23,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-10-03 08:43:24,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:24,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:43:24,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:43:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:43:24,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:43:24,079 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states. [2018-10-03 08:43:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:25,047 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2018-10-03 08:43:25,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:43:25,047 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-10-03 08:43:25,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:25,049 INFO L225 Difference]: With dead ends: 495 [2018-10-03 08:43:25,049 INFO L226 Difference]: Without dead ends: 331 [2018-10-03 08:43:25,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:43:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-03 08:43:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-03 08:43:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-03 08:43:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-10-03 08:43:25,054 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2018-10-03 08:43:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:25,054 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-10-03 08:43:25,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:43:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-10-03 08:43:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-03 08:43:25,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:25,056 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-10-03 08:43:25,056 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:25,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:25,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times [2018-10-03 08:43:25,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:25,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:25,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:25,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:25,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-10-03 08:43:27,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:27,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:27,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:34,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-03 08:43:34,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:34,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-10-03 08:43:34,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:34,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:43:34,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:43:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:43:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:43:34,277 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states. [2018-10-03 08:43:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:35,236 INFO L93 Difference]: Finished difference Result 501 states and 504 transitions. [2018-10-03 08:43:35,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:43:35,236 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-10-03 08:43:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:35,238 INFO L225 Difference]: With dead ends: 501 [2018-10-03 08:43:35,239 INFO L226 Difference]: Without dead ends: 335 [2018-10-03 08:43:35,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:43:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-10-03 08:43:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-10-03 08:43:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-03 08:43:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-10-03 08:43:35,244 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2018-10-03 08:43:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:35,244 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-10-03 08:43:35,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:43:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-10-03 08:43:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-03 08:43:35,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:35,245 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1] [2018-10-03 08:43:35,245 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:35,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times [2018-10-03 08:43:35,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:35,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:35,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:35,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:35,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-10-03 08:43:37,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:37,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:37,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:38,094 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:38,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:38,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-10-03 08:43:38,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:38,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:43:38,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:43:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:43:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:43:38,190 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states. [2018-10-03 08:43:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:39,097 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2018-10-03 08:43:39,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:43:39,097 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-10-03 08:43:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:39,099 INFO L225 Difference]: With dead ends: 507 [2018-10-03 08:43:39,099 INFO L226 Difference]: Without dead ends: 339 [2018-10-03 08:43:39,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:43:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-03 08:43:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-03 08:43:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-03 08:43:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-10-03 08:43:39,103 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-10-03 08:43:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:39,104 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-10-03 08:43:39,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:43:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-10-03 08:43:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-03 08:43:39,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:39,105 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-10-03 08:43:39,105 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:39,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times [2018-10-03 08:43:39,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:39,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:39,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:39,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:39,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-10-03 08:43:42,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:42,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:42,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:51,242 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-03 08:43:51,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:51,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-10-03 08:43:51,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:51,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:43:51,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:43:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:43:51,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:43:51,370 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states. [2018-10-03 08:43:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:52,322 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2018-10-03 08:43:52,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:43:52,323 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-10-03 08:43:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:52,325 INFO L225 Difference]: With dead ends: 513 [2018-10-03 08:43:52,325 INFO L226 Difference]: Without dead ends: 343 [2018-10-03 08:43:52,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:43:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-03 08:43:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-10-03 08:43:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-03 08:43:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-10-03 08:43:52,330 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-10-03 08:43:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:52,331 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-10-03 08:43:52,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:43:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-10-03 08:43:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-03 08:43:52,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:52,332 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1] [2018-10-03 08:43:52,332 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:52,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times [2018-10-03 08:43:52,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:52,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:52,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-10-03 08:43:55,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:55,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:55,071 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:59,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-03 08:43:59,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:59,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-10-03 08:43:59,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:59,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:43:59,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:43:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:43:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:43:59,915 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states. [2018-10-03 08:44:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:01,048 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2018-10-03 08:44:01,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:44:01,048 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-10-03 08:44:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:01,050 INFO L225 Difference]: With dead ends: 519 [2018-10-03 08:44:01,051 INFO L226 Difference]: Without dead ends: 347 [2018-10-03 08:44:01,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:44:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-03 08:44:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-10-03 08:44:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-03 08:44:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2018-10-03 08:44:01,057 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2018-10-03 08:44:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:01,057 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2018-10-03 08:44:01,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:44:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2018-10-03 08:44:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-03 08:44:01,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:01,060 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1] [2018-10-03 08:44:01,060 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:01,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times [2018-10-03 08:44:01,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:01,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:01,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:01,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:01,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-10-03 08:44:03,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:03,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:04,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:04,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-10-03 08:44:04,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:04,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:44:04,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:44:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:44:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:44:04,266 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states. [2018-10-03 08:44:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:05,178 INFO L93 Difference]: Finished difference Result 525 states and 528 transitions. [2018-10-03 08:44:05,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:44:05,179 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-10-03 08:44:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:05,181 INFO L225 Difference]: With dead ends: 525 [2018-10-03 08:44:05,182 INFO L226 Difference]: Without dead ends: 351 [2018-10-03 08:44:05,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:44:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-03 08:44:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-10-03 08:44:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-10-03 08:44:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-10-03 08:44:05,188 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2018-10-03 08:44:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:05,188 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-10-03 08:44:05,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:44:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-10-03 08:44:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-03 08:44:05,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:05,190 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1] [2018-10-03 08:44:05,191 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:05,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times [2018-10-03 08:44:05,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:05,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:05,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:05,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:05,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-10-03 08:44:08,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:08,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:08,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:08,363 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:08,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:08,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-10-03 08:44:08,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:08,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:44:08,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:44:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:44:08,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:44:08,465 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states. [2018-10-03 08:44:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:09,784 INFO L93 Difference]: Finished difference Result 531 states and 534 transitions. [2018-10-03 08:44:09,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:44:09,785 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-10-03 08:44:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:09,787 INFO L225 Difference]: With dead ends: 531 [2018-10-03 08:44:09,787 INFO L226 Difference]: Without dead ends: 355 [2018-10-03 08:44:09,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:44:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-03 08:44:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-10-03 08:44:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-03 08:44:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-10-03 08:44:09,793 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2018-10-03 08:44:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:09,793 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-10-03 08:44:09,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:44:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-10-03 08:44:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-03 08:44:09,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:09,795 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1] [2018-10-03 08:44:09,795 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:09,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times [2018-10-03 08:44:09,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:09,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:09,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-10-03 08:44:12,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:12,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:44:12,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:21,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-03 08:44:21,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:21,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-10-03 08:44:21,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:21,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:44:21,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:44:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:44:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:44:21,280 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states. [2018-10-03 08:44:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:22,256 INFO L93 Difference]: Finished difference Result 537 states and 540 transitions. [2018-10-03 08:44:22,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:44:22,257 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-10-03 08:44:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:22,259 INFO L225 Difference]: With dead ends: 537 [2018-10-03 08:44:22,259 INFO L226 Difference]: Without dead ends: 359 [2018-10-03 08:44:22,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:44:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-10-03 08:44:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-10-03 08:44:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-03 08:44:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2018-10-03 08:44:22,264 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354 [2018-10-03 08:44:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:22,265 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2018-10-03 08:44:22,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:44:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2018-10-03 08:44:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-03 08:44:22,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:22,266 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1, 1, 1] [2018-10-03 08:44:22,266 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:22,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash 956890027, now seen corresponding path program 88 times [2018-10-03 08:44:22,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:22,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:22,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:22,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:22,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:44:23,555 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:44:23,559 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:44:23,560 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:44:23 BoogieIcfgContainer [2018-10-03 08:44:23,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:44:23,560 INFO L168 Benchmark]: Toolchain (without parser) took 246250.15 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 36.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 301.6 MB). Peak memory consumption was 338.3 MB. Max. memory is 7.1 GB. [2018-10-03 08:44:23,562 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:44:23,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:44:23,563 INFO L168 Benchmark]: Boogie Preprocessor took 21.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:44:23,563 INFO L168 Benchmark]: RCFGBuilder took 363.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:44:23,563 INFO L168 Benchmark]: TraceAbstraction took 245813.36 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 36.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 280.5 MB). Peak memory consumption was 317.2 MB. Max. memory is 7.1 GB. [2018-10-03 08:44:23,566 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 363.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245813.36 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 36.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 280.5 MB). Peak memory consumption was 317.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 56). Cancelled while BasicCegarLoop was analyzing trace of length 359 with TraceHistMax 89, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 245.7s OverallTime, 89 OverallIterations, 89 TraceHistogramMax, 39.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 528 SDtfs, 7019 SDslu, 9878 SDs, 0 SdLazy, 10054 SolverSat, 7269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19751 GetRequests, 15835 SyntacticMatches, 0 SemanticMatches, 3916 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 88 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 86.6s SatisfiabilityAnalysisTime, 110.7s InterpolantComputationTime, 31674 NumberOfCodeBlocks, 31674 NumberOfCodeBlocksAsserted, 2125 NumberOfCheckSat, 31499 ConstructedInterpolants, 0 QuantifiedInterpolants, 14880931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47415 ConjunctsInSsa, 4002 ConjunctsInUnsatCore, 175 InterpolantComputations, 1 PerfectInterpolantSequences, 454256/908512 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/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-44-23-576.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-44-23-576.csv Completed graceful shutdown