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/jain_5.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:17:04,142 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:17:04,144 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:17:04,158 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:17:04,158 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:17:04,159 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:17:04,160 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:17:04,162 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:17:04,165 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:17:04,166 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:17:04,167 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:17:04,167 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:17:04,168 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:17:04,169 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:17:04,173 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:17:04,174 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:17:04,178 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:17:04,182 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:17:04,184 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:17:04,185 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:17:04,186 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:17:04,192 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:17:04,197 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:17:04,212 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:17:04,234 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:17:04,235 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:17:04,236 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:17:04,236 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:17:04,237 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:17:04,237 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:17:04,237 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:17:04,238 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:17:04,239 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:17:04,239 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:17:04,239 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:17:04,239 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:17:04,239 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:17:04,240 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:17:04,240 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:17:04,240 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:17:04,240 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:17:04,240 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:17:04,242 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:17:04,242 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:17:04,242 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:17:04,242 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:17:04,242 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:17:04,243 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:17:04,243 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:17:04,243 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:17:04,243 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:17:04,243 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:17:04,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:17:04,244 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:17:04,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:17:04,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:17:04,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:17:04,313 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:17:04,314 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:17:04,315 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl [2018-09-30 20:17:04,315 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl' [2018-09-30 20:17:04,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:17:04,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:17:04,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:17:04,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:17:04,374 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:17:04,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:17:04,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:17:04,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:17:04,418 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:17:04,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... [2018-09-30 20:17:04,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:17:04,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:17:04,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:17:04,443 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:17:04,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:17:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:17:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:17:04,719 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:17:04,720 INFO L202 PluginConnector]: Adding new model jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:17:04 BoogieIcfgContainer [2018-09-30 20:17:04,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:17:04,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:17:04,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:17:04,725 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:17:04,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:17:04" (1/2) ... [2018-09-30 20:17:04,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37924a08 and model type jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:17:04, skipping insertion in model container [2018-09-30 20:17:04,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:17:04" (2/2) ... [2018-09-30 20:17:04,728 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5.i_2.bpl [2018-09-30 20:17:04,738 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:17:04,746 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:17:04,805 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:17:04,806 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:17:04,806 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:17:04,806 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:17:04,806 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:17:04,808 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:17:04,808 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:17:04,809 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:17:04,809 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:17:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:17:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:17:04,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:04,841 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:17:04,842 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:04,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-09-30 20:17:04,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:04,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:04,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:04,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:04,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:05,074 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:17:05,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:17:05,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:17:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:17:05,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:17:05,107 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-09-30 20:17:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:05,239 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-09-30 20:17:05,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:17:05,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 20:17:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:05,250 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:17:05,250 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:17:05,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:17:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:17:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-09-30 20:17:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:17:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:17:05,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:17:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:05,289 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:17:05,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:17:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:17:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:17:05,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:05,290 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:17:05,291 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:05,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-09-30 20:17:05,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:05,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:05,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:05,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:05,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:05,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:05,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:05,804 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2018-09-30 20:17:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:06,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:06,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-30 20:17:06,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:17:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:17:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:17:06,042 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-09-30 20:17:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:06,191 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:17:06,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:17:06,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-09-30 20:17:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:06,192 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:17:06,192 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:17:06,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:17:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:17:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-30 20:17:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:17:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:17:06,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:17:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:06,199 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:17:06,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:17:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:17:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:17:06,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:06,200 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 20:17:06,201 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:06,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-09-30 20:17:06,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:06,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:06,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:06,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:06,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:06,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:17:06,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:17:06,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:06,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:06,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:06,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 20:17:06,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:17:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:17:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:17:06,847 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2018-09-30 20:17:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:06,948 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:17:06,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:17:06,953 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-09-30 20:17:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:06,953 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:17:06,953 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:17:06,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:17:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:17:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-09-30 20:17:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:17:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:17:06,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:17:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:06,960 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:17:06,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:17:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:17:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:17:06,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:06,961 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:17:06,961 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:06,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1596122631, now seen corresponding path program 3 times [2018-09-30 20:17:06,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:06,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:06,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:06,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:06,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:07,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:07,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:07,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:17:07,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:17:07,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:07,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:07,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:07,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:17:07,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:17:07,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:17:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:17:07,747 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2018-09-30 20:17:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:07,864 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:17:07,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:17:07,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:17:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:07,868 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:17:07,868 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:17:07,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:17:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:17:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-09-30 20:17:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:17:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:17:07,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:17:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:07,874 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:17:07,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:17:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:17:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:17:07,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:07,875 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 20:17:07,875 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:07,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash -570590731, now seen corresponding path program 4 times [2018-09-30 20:17:07,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:07,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:07,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:07,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:07,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:08,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:08,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:08,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:17:08,174 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:17:08,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:08,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:08,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:08,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-30 20:17:08,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:17:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:17:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:17:08,502 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-09-30 20:17:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:08,639 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:17:08,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:17:08,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 20:17:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:08,640 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:17:08,640 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:17:08,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:17:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:17:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-09-30 20:17:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:17:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:17:08,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:17:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:08,647 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:17:08,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:17:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:17:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:17:08,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:08,648 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:17:08,648 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:08,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1418054385, now seen corresponding path program 5 times [2018-09-30 20:17:08,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:08,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:08,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:08,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:08,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:08,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:08,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:08,855 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:17:23,360 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:17:23,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:23,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:23,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:23,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-30 20:17:23,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:17:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:17:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:17:23,775 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2018-09-30 20:17:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:23,994 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:17:23,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:17:23,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-09-30 20:17:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:23,997 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:17:23,997 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:17:23,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:17:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:17:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-09-30 20:17:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:17:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:17:24,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:17:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:24,005 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:17:24,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:17:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:17:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:17:24,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:24,006 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 20:17:24,006 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:24,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1245564141, now seen corresponding path program 6 times [2018-09-30 20:17:24,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:24,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:24,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:24,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:24,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:24,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:24,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:24,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:17:36,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:17:36,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:36,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:36,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:36,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 20:17:36,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:17:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:17:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:17:36,974 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-09-30 20:17:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:37,260 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:17:37,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:17:37,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2018-09-30 20:17:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:37,264 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:17:37,264 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:17:37,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:17:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:17:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-09-30 20:17:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:17:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:17:37,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:17:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:37,271 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:17:37,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:17:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:17:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:17:37,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:37,272 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:17:37,272 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:37,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1308803095, now seen corresponding path program 7 times [2018-09-30 20:17:37,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:37,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:37,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:37,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:37,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:37,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:37,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:37,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:37,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:37,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:37,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-30 20:17:37,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:17:37,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:17:37,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:17:37,907 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-09-30 20:17:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:38,773 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:17:38,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:17:38,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2018-09-30 20:17:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:38,775 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:17:38,775 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:17:38,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:17:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:17:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-09-30 20:17:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:17:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:17:38,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:17:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:38,781 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:17:38,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:17:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:17:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:17:38,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:38,782 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 20:17:38,782 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:38,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 665576421, now seen corresponding path program 8 times [2018-09-30 20:17:38,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:38,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:38,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:38,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:39,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:39,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:39,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:17:39,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:17:39,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:39,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:39,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:39,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-30 20:17:39,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:17:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:17:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:17:39,557 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2018-09-30 20:17:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:40,190 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:17:40,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:17:40,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2018-09-30 20:17:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:40,192 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:17:40,192 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:17:40,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:17:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:17:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-09-30 20:17:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:17:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:17:40,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:17:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:40,201 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:17:40,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:17:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:17:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:17:40,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:40,202 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:17:40,202 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:40,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash -331253535, now seen corresponding path program 9 times [2018-09-30 20:17:40,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:40,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:40,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:40,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:40,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:40,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:40,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:17:45,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:17:45,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:45,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:45,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:45,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-30 20:17:45,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:17:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:17:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:17:45,820 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 26 states. [2018-09-30 20:17:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:46,260 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:17:46,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:17:46,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2018-09-30 20:17:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:46,262 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:17:46,262 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:17:46,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:17:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:17:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-30 20:17:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:17:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:17:46,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 20:17:46,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:46,271 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:17:46,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:17:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:17:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:17:46,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:46,272 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 20:17:46,272 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:46,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash -507134243, now seen corresponding path program 10 times [2018-09-30 20:17:46,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:46,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:46,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:46,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:46,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:46,597 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 20:17:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:46,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:46,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:46,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:17:46,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:17:46,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:46,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:47,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:47,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-30 20:17:47,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:17:47,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:17:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:17:47,313 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 28 states. [2018-09-30 20:17:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:47,792 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:17:47,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:17:47,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2018-09-30 20:17:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:47,793 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:17:47,793 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:17:47,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:17:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:17:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-09-30 20:17:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:17:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:17:47,801 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 20:17:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:47,801 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:17:47,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:17:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:17:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:17:47,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:47,803 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 20:17:47,803 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:47,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770087, now seen corresponding path program 11 times [2018-09-30 20:17:47,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:47,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:47,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:47,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:47,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:48,116 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 20:17:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:48,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:48,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:48,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:19:20,721 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:19:20,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:19:20,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:19:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:19:21,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:19:21,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-30 20:19:21,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:19:21,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:19:21,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:19:21,263 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 30 states. [2018-09-30 20:19:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:19:21,987 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:19:21,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:19:21,987 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2018-09-30 20:19:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:19:21,988 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:19:21,989 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:19:21,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:19:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:19:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-09-30 20:19:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:19:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:19:21,998 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 20:19:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:19:21,998 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:19:21,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:19:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:19:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:19:21,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:19:21,999 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 20:19:21,999 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:19:22,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:19:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash -183935531, now seen corresponding path program 12 times [2018-09-30 20:19:22,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:19:22,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:19:22,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:22,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:19:22,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:19:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:19:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:19:22,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:19:22,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:19:22,388 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:20:27,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:20:27,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:20:27,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:20:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:20:28,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:20:28,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-30 20:20:28,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:20:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:20:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:20:28,395 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 32 states. [2018-09-30 20:20:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:20:29,013 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:20:29,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:20:29,014 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2018-09-30 20:20:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:20:29,015 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:20:29,015 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:20:29,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:20:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:20:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-09-30 20:20:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:20:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:20:29,025 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 20:20:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:20:29,025 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:20:29,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:20:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:20:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:20:29,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:20:29,026 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 20:20:29,027 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:20:29,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:20:29,027 INFO L82 PathProgramCache]: Analyzing trace with hash -668453167, now seen corresponding path program 13 times [2018-09-30 20:20:29,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:20:29,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:20:29,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:20:29,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:20:29,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:20:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:20:29,342 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 20:20:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:20:30,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:20:30,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:20:30,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:20:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:20:30,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:20:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:20:30,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:20:30,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-30 20:20:30,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:20:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:20:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:20:30,739 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 34 states. [2018-09-30 20:20:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:20:31,871 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:20:31,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:20:31,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 30 [2018-09-30 20:20:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:20:31,873 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:20:31,873 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:20:31,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=158, Invalid=1912, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:20:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:20:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-30 20:20:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:20:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:20:31,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 20:20:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:20:31,884 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:20:31,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:20:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:20:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:20:31,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:20:31,885 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 20:20:31,885 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:20:31,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:20:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1861533901, now seen corresponding path program 14 times [2018-09-30 20:20:31,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:20:31,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:20:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:20:31,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:20:31,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:20:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:20:32,248 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 20:20:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:20:32,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:20:32,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:20:32,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:20:32,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:20:32,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:20:32,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:20:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:20:33,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:20:33,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-30 20:20:33,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:20:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:20:33,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:20:33,054 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-09-30 20:20:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:20:33,839 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:20:33,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:20:33,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-09-30 20:20:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:20:33,840 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:20:33,840 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:20:33,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=2183, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:20:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:20:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-09-30 20:20:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:20:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:20:33,849 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 20:20:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:20:33,849 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:20:33,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:20:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:20:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:20:33,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:20:33,850 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 20:20:33,851 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:20:33,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:20:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2067350583, now seen corresponding path program 15 times [2018-09-30 20:20:33,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:20:33,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:20:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:20:33,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:20:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:20:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:20:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:20:34,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:20:34,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:20:34,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown