java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:22:50,354 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:22:50,356 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:22:50,369 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:22:50,369 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:22:50,370 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:22:50,372 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:22:50,374 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:22:50,375 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:22:50,376 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:22:50,377 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:22:50,377 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:22:50,378 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:22:50,379 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:22:50,381 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:22:50,381 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:22:50,382 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:22:50,384 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:22:50,386 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:22:50,388 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:22:50,389 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:22:50,390 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:22:50,393 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:22:50,402 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 [2018-09-23 21:22:50,417 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:22:50,417 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:22:50,418 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:22:50,419 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:22:50,419 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:22:50,419 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:22:50,420 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:22:50,420 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:22:50,420 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:22:50,420 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:22:50,421 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:22:50,421 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:22:50,421 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:22:50,421 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:22:50,421 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:22:50,422 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:22:50,422 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:22:50,422 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:22:50,422 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:22:50,422 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:22:50,423 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:22:50,423 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:22:50,423 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:22:50,423 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:22:50,423 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:22:50,424 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:22:50,424 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:22:50,424 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:22:50,424 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:22:50,424 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:22:50,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:22:50,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:22:50,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:22:50,503 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:22:50,504 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:22:50,505 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl [2018-09-23 21:22:50,506 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl' [2018-09-23 21:22:50,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:22:50,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:22:50,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:50,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:22:50,585 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:22:50,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:50,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:22:50,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:22:50,633 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:22:50,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:22:50,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:22:50,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:22:50,660 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:22:50,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (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 [2018-09-23 21:22:50,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:22:50,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:22:50,927 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:22:50,928 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:50 BoogieIcfgContainer [2018-09-23 21:22:50,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:22:50,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:22:50,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:22:50,933 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:22:50,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/2) ... [2018-09-23 21:22:50,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef66eba and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:22:50, skipping insertion in model container [2018-09-23 21:22:50,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:50" (2/2) ... [2018-09-23 21:22:50,936 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl [2018-09-23 21:22:50,946 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:22:50,954 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:22:51,004 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:22:51,005 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:22:51,005 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:22:51,005 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:22:51,006 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:22:51,006 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:22:51,006 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:22:51,006 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:22:51,006 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:22:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 21:22:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:22:51,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,030 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 21:22:51,031 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-09-23 21:22:51,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,179 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:22:51,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:22:51,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:22:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:22:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:51,200 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-23 21:22:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,281 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-23 21:22:51,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:22:51,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-23 21:22:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,298 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:22:51,299 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:22:51,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:22:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:22:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:22:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 21:22:51,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-09-23 21:22:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,372 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 21:22:51,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:22:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 21:22:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:22:51,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,373 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:22:51,374 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-09-23 21:22:51,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:22:51,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,435 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 [2018-09-23 21:22:51,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 21:22:51,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:51,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:22:51,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:22:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:22:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:51,555 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-09-23 21:22:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,719 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-23 21:22:51,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:22:51,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-23 21:22:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,721 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:22:51,721 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:22:51,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:22:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:22:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:22:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 21:22:51,727 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-23 21:22:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,727 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 21:22:51,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:22:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 21:22:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:22:51,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,728 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-23 21:22:51,729 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times [2018-09-23 21:22:51,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 21:22:51,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,914 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 [2018-09-23 21:22:51,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:51,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:51,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:51,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 21:22:51,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:22:52,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:22:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:22:52,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:22:52,001 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-09-23 21:22:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,088 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-23 21:22:52,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:22:52,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-23 21:22:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,090 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:22:52,090 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:22:52,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:22:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:22:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:22:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:22:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 21:22:52,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-23 21:22:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,096 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 21:22:52,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:22:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 21:22:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:22:52,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,098 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-23 21:22:52,098 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times [2018-09-23 21:22:52,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-23 21:22:52,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,324 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 [2018-09-23 21:22:52,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:52,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:22:52,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:52,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-23 21:22:52,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:22:52,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:22:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:22:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:52,443 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-09-23 21:22:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,610 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-09-23 21:22:52,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:22:52,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-23 21:22:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,611 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:22:52,611 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:22:52,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:22:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:22:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:22:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 21:22:52,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-09-23 21:22:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,621 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 21:22:52,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:22:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 21:22:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:22:52,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,623 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-23 21:22:52,623 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times [2018-09-23 21:22:52,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-23 21:22:52,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,765 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 [2018-09-23 21:22:52,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:52,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:52,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:52,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-23 21:22:52,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:22:52,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:22:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:22:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:52,835 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-09-23 21:22:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,900 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-09-23 21:22:52,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:22:52,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-09-23 21:22:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,903 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:22:52,903 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:22:52,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:22:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:22:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:22:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 21:22:52,909 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-09-23 21:22:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,910 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 21:22:52,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:22:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 21:22:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:22:52,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,911 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-23 21:22:52,911 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times [2018-09-23 21:22:52,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-23 21:22:53,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:53,127 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:53,158 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 21:22:53,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:53,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-23 21:22:53,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:22:53,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:22:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:22:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:22:53,193 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-09-23 21:22:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:53,334 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-23 21:22:53,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:22:53,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-23 21:22:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:53,336 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:22:53,336 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:22:53,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:22:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:22:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:22:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:22:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 21:22:53,342 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-09-23 21:22:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:53,343 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 21:22:53,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:22:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 21:22:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:22:53,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:53,344 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-23 21:22:53,345 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:53,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times [2018-09-23 21:22:53,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:53,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:53,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:53,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-23 21:22:53,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,475 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 [2018-09-23 21:22:53,499 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:53,608 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:22:53,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:53,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-23 21:22:53,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:22:53,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:22:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:22:53,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:53,668 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-09-23 21:22:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:53,913 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-09-23 21:22:53,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:22:53,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-09-23 21:22:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:53,914 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:22:53,915 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:22:53,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:22:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:22:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:22:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 21:22:53,921 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-09-23 21:22:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:53,922 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 21:22:53,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:22:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 21:22:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:22:53,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:53,924 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-23 21:22:53,924 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:53,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times [2018-09-23 21:22:53,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:53,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:53,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:53,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-23 21:22:54,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:54,084 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 [2018-09-23 21:22:54,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-23 21:22:54,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:22:54,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:22:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:22:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:54,170 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-09-23 21:22:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,248 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2018-09-23 21:22:54,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:22:54,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-09-23 21:22:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,256 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:22:54,256 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:22:54,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:22:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:22:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:22:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 21:22:54,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2018-09-23 21:22:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,265 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 21:22:54,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:22:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 21:22:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:22:54,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,267 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-23 21:22:54,267 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times [2018-09-23 21:22:54,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:54,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-23 21:22:54,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:54,841 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 [2018-09-23 21:22:54,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:54,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:54,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:54,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-23 21:22:54,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:22:54,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:22:54,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:22:54,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:54,925 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-09-23 21:22:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:55,014 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-09-23 21:22:55,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:22:55,014 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-09-23 21:22:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:55,016 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:22:55,016 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:22:55,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:22:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:22:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:22:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 21:22:55,023 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-09-23 21:22:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:55,023 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 21:22:55,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:22:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 21:22:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:22:55,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:55,025 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-23 21:22:55,025 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:55,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times [2018-09-23 21:22:55,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:55,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:55,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:55,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-23 21:22:55,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,215 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 [2018-09-23 21:22:55,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:55,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 21:22:55,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:55,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-23 21:22:55,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:55,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:22:55,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:22:55,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:22:55,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:55,440 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-09-23 21:22:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:55,649 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-09-23 21:22:55,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:22:55,650 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-09-23 21:22:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:55,650 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:22:55,651 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:22:55,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:22:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:22:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:22:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 21:22:55,659 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2018-09-23 21:22:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:55,659 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 21:22:55,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:22:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 21:22:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:22:55,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:55,661 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-23 21:22:55,661 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:55,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times [2018-09-23 21:22:55,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:55,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:55,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:55,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-23 21:22:55,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,945 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 [2018-09-23 21:22:55,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:55,980 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:55,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:55,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-23 21:22:56,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:22:56,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:22:56,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:22:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:56,018 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2018-09-23 21:22:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,085 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-23 21:22:56,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:22:56,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-09-23 21:22:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,088 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:22:56,088 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:22:56,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:22:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:22:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:22:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 21:22:56,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-09-23 21:22:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,095 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 21:22:56,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:22:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 21:22:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:22:56,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,097 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-23 21:22:56,097 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times [2018-09-23 21:22:56,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-09-23 21:22:56,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:56,289 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 [2018-09-23 21:22:56,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:56,340 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 21:22:56,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:56,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-09-23 21:22:56,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:22:56,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:22:56,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:22:56,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:56,378 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-09-23 21:22:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,459 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-09-23 21:22:56,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:22:56,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-09-23 21:22:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,460 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:22:56,460 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:22:56,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:22:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:22:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:22:56,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 21:22:56,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-09-23 21:22:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,473 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 21:22:56,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:22:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 21:22:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:22:56,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,474 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-23 21:22:56,475 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,475 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times [2018-09-23 21:22:56,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-23 21:22:56,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:56,732 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 [2018-09-23 21:22:56,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:56,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:22:56,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:56,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-23 21:22:56,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:22:56,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:22:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:22:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:56,837 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2018-09-23 21:22:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,951 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2018-09-23 21:22:56,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:22:56,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-09-23 21:22:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,952 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:22:56,952 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:22:56,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:22:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:22:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:22:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 21:22:56,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-09-23 21:22:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,958 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 21:22:56,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:22:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 21:22:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:22:56,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,959 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-23 21:22:56,959 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times [2018-09-23 21:22:56,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-09-23 21:22:57,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:57,279 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 [2018-09-23 21:22:57,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-09-23 21:22:57,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:57,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:22:57,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:22:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:22:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:57,371 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2018-09-23 21:22:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:57,488 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2018-09-23 21:22:57,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:22:57,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-23 21:22:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:57,490 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:22:57,490 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:22:57,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:22:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:22:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:22:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 21:22:57,497 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-09-23 21:22:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:57,498 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 21:22:57,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:22:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 21:22:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:22:57,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:57,499 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-23 21:22:57,499 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:57,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times [2018-09-23 21:22:57,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:57,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:57,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:57,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-23 21:22:57,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:57,739 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 [2018-09-23 21:22:57,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:57,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:57,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:57,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-23 21:22:57,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:57,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:22:57,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:22:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:22:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:57,841 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states. [2018-09-23 21:22:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:58,059 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-09-23 21:22:58,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:22:58,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-09-23 21:22:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:58,060 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:22:58,060 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:22:58,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:22:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:22:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:22:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 21:22:58,067 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-09-23 21:22:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:58,067 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 21:22:58,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:22:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 21:22:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:22:58,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:58,068 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-23 21:22:58,069 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:58,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times [2018-09-23 21:22:58,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:58,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:58,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:58,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-23 21:22:58,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:58,531 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 [2018-09-23 21:22:58,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:58,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:22:58,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:58,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-23 21:22:58,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:58,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:22:58,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:22:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:22:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:58,679 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2018-09-23 21:22:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:59,153 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-23 21:22:59,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:22:59,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-09-23 21:22:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:59,155 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:22:59,155 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:22:59,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:22:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:22:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:22:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 21:22:59,162 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-09-23 21:22:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:59,162 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 21:22:59,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:22:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 21:22:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:22:59,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:59,163 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-23 21:22:59,164 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:59,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times [2018-09-23 21:22:59,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:59,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:59,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:59,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-09-23 21:22:59,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:59,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:59,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:59,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:59,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:59,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-09-23 21:22:59,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:59,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:22:59,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:22:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:22:59,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:59,601 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states. [2018-09-23 21:22:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:59,849 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2018-09-23 21:22:59,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:22:59,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-09-23 21:22:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:59,851 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:22:59,851 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:22:59,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:22:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:22:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:22:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 21:22:59,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2018-09-23 21:22:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:59,858 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 21:22:59,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:22:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 21:22:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:22:59,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:59,860 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-23 21:22:59,860 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:59,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times [2018-09-23 21:22:59,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:59,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:59,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:59,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-09-23 21:23:00,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:00,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:00,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:00,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:23:00,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:00,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-09-23 21:23:00,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:00,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:23:00,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:23:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:23:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:23:00,329 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-09-23 21:23:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:00,404 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2018-09-23 21:23:00,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:23:00,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-09-23 21:23:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:00,406 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:23:00,406 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:23:00,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:23:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:23:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:23:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:23:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 21:23:00,413 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-09-23 21:23:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:00,414 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 21:23:00,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:23:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 21:23:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:23:00,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:00,415 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-23 21:23:00,415 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:00,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times [2018-09-23 21:23:00,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:00,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:00,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:00,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-09-23 21:23:00,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:00,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:00,755 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:00,817 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:23:00,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:00,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-09-23 21:23:00,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:00,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:23:00,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:23:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:23:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:23:00,865 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2018-09-23 21:23:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:00,958 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2018-09-23 21:23:00,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:23:00,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-09-23 21:23:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:00,960 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:23:00,960 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:23:00,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:23:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:23:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:23:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:23:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 21:23:00,966 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2018-09-23 21:23:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:00,967 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 21:23:00,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:23:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 21:23:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:23:00,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:00,968 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-23 21:23:00,968 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:00,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times [2018-09-23 21:23:00,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:00,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:00,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:00,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-09-23 21:23:01,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:01,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:01,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-09-23 21:23:01,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:01,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:23:01,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:23:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:23:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:23:01,995 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states. [2018-09-23 21:23:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:02,208 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2018-09-23 21:23:02,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:23:02,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-09-23 21:23:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:02,209 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:23:02,209 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:23:02,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:23:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:23:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:23:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:23:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 21:23:02,214 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2018-09-23 21:23:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:02,215 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 21:23:02,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:23:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 21:23:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:23:02,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:02,216 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-23 21:23:02,216 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:02,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:02,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times [2018-09-23 21:23:02,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:02,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:02,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:02,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:02,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-09-23 21:23:02,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:02,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:02,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:02,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:02,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:02,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-09-23 21:23:02,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:02,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:23:02,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:23:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:23:02,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:23:02,893 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states. [2018-09-23 21:23:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:02,991 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-23 21:23:02,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:23:02,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-09-23 21:23:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:02,993 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:23:02,993 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:23:02,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:23:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:23:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:23:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:23:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 21:23:02,997 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-09-23 21:23:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:02,997 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 21:23:02,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:23:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 21:23:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:23:02,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:02,999 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-23 21:23:02,999 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:02,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times [2018-09-23 21:23:02,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:02,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:03,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:03,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-23 21:23:03,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:03,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:03,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:03,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 21:23:03,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:03,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-23 21:23:03,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:03,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:23:03,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:23:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:23:03,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:23:03,531 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2018-09-23 21:23:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:03,713 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2018-09-23 21:23:03,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:23:03,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-09-23 21:23:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:03,717 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:23:03,717 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:23:03,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:23:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:23:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:23:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:23:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 21:23:03,722 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2018-09-23 21:23:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:03,723 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 21:23:03,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:23:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 21:23:03,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:23:03,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:03,724 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-23 21:23:03,724 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:03,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:03,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times [2018-09-23 21:23:03,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:03,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:03,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:03,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-09-23 21:23:04,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:04,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:04,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:04,171 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:04,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:04,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-09-23 21:23:04,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:04,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:23:04,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:23:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:23:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:23:04,220 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states. [2018-09-23 21:23:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:04,328 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2018-09-23 21:23:04,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:23:04,329 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-09-23 21:23:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:04,330 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:23:04,330 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:23:04,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:23:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:23:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:23:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:23:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 21:23:04,335 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2018-09-23 21:23:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:04,335 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 21:23:04,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:23:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 21:23:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:23:04,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:04,336 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-23 21:23:04,337 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:04,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times [2018-09-23 21:23:04,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:04,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-23 21:23:04,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:04,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:04,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:05,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 21:23:05,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:05,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-23 21:23:05,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:05,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:23:05,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:23:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:23:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:23:05,126 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states. [2018-09-23 21:23:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:05,218 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2018-09-23 21:23:05,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:23:05,218 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-09-23 21:23:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:05,219 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:23:05,219 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:23:05,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:23:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:23:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:23:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:23:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 21:23:05,225 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-09-23 21:23:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:05,225 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 21:23:05,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:23:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 21:23:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:23:05,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:05,226 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-23 21:23:05,226 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:05,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:05,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times [2018-09-23 21:23:05,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:05,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:05,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:05,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-23 21:23:06,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:06,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:06,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:06,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:23:06,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:06,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-23 21:23:06,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:06,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:23:06,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:23:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:23:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:23:06,209 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2018-09-23 21:23:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:06,405 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2018-09-23 21:23:06,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:23:06,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-09-23 21:23:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:06,407 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:23:06,407 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:23:06,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:23:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:23:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:23:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:23:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 21:23:06,412 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2018-09-23 21:23:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:06,412 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 21:23:06,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:23:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 21:23:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:23:06,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:06,413 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-23 21:23:06,414 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:06,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:06,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times [2018-09-23 21:23:06,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:06,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:06,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:06,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:06,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-09-23 21:23:07,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:07,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:07,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:07,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-09-23 21:23:07,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:07,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:23:07,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:23:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:23:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:23:07,111 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states. [2018-09-23 21:23:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:07,267 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-23 21:23:07,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:23:07,267 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-09-23 21:23:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:07,268 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:23:07,268 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:23:07,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:23:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:23:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:23:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:23:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 21:23:07,274 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2018-09-23 21:23:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 21:23:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:23:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 21:23:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:23:07,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:07,276 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-23 21:23:07,276 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:07,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times [2018-09-23 21:23:07,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:07,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:07,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:07,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:07,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-09-23 21:23:08,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:08,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:08,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:08,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:08,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:08,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-09-23 21:23:08,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:08,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:23:08,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:23:08,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:23:08,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:23:08,442 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states. [2018-09-23 21:23:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:08,604 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-09-23 21:23:08,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:23:08,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-09-23 21:23:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:08,607 INFO L225 Difference]: With dead ends: 171 [2018-09-23 21:23:08,607 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:23:08,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:23:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:23:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:23:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:23:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 21:23:08,610 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-09-23 21:23:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:08,611 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 21:23:08,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:23:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 21:23:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:23:08,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:08,612 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-23 21:23:08,612 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:08,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:08,612 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times [2018-09-23 21:23:08,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:08,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:08,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:08,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-09-23 21:23:09,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:09,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:09,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:09,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 21:23:09,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:09,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-09-23 21:23:09,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:09,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:23:09,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:23:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:23:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:23:09,265 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2018-09-23 21:23:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:09,391 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2018-09-23 21:23:09,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:23:09,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-09-23 21:23:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:09,392 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:23:09,392 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:23:09,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:23:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:23:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 21:23:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:23:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-23 21:23:09,399 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2018-09-23 21:23:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:09,399 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-23 21:23:09,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:23:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-23 21:23:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:23:09,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:09,400 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-23 21:23:09,401 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:09,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times [2018-09-23 21:23:09,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:09,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:09,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:09,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-23 21:23:10,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:10,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:10,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:10,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:10,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:10,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-23 21:23:10,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:10,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:23:10,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:23:10,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:23:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:23:10,344 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states. [2018-09-23 21:23:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:10,657 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2018-09-23 21:23:10,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:23:10,658 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-09-23 21:23:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:10,659 INFO L225 Difference]: With dead ends: 183 [2018-09-23 21:23:10,659 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:23:10,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:23:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:23:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 21:23:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 21:23:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-23 21:23:10,665 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2018-09-23 21:23:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:10,665 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-23 21:23:10,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:23:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-23 21:23:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 21:23:10,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:10,666 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-23 21:23:10,666 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:10,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times [2018-09-23 21:23:10,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:10,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:10,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-09-23 21:23:11,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:11,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:11,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:11,394 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 21:23:11,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:11,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-09-23 21:23:11,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:11,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:23:11,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:23:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:23:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:23:11,439 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states. [2018-09-23 21:23:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:11,593 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2018-09-23 21:23:11,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:23:11,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-09-23 21:23:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:11,595 INFO L225 Difference]: With dead ends: 189 [2018-09-23 21:23:11,595 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 21:23:11,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:23:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 21:23:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 21:23:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 21:23:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-23 21:23:11,601 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-09-23 21:23:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:11,602 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-23 21:23:11,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:23:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-23 21:23:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 21:23:11,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:11,603 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-23 21:23:11,603 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:11,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times [2018-09-23 21:23:11,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:11,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:11,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:11,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-09-23 21:23:12,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:12,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:12,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:12,499 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:23:12,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:12,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-09-23 21:23:12,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:12,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:23:12,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:23:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:23:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:23:12,558 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2018-09-23 21:23:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:12,748 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-23 21:23:12,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:23:12,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-09-23 21:23:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:12,750 INFO L225 Difference]: With dead ends: 195 [2018-09-23 21:23:12,750 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:23:12,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:23:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:23:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 21:23:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 21:23:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-23 21:23:12,755 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2018-09-23 21:23:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:12,756 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-23 21:23:12,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:23:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-23 21:23:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 21:23:12,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:12,757 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-23 21:23:12,757 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:12,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times [2018-09-23 21:23:12,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:12,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:12,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:12,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:12,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-23 21:23:14,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:14,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:14,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:14,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-23 21:23:14,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:14,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:23:14,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:23:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:23:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:23:14,339 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states. [2018-09-23 21:23:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:14,588 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-09-23 21:23:14,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:23:14,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-09-23 21:23:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:14,592 INFO L225 Difference]: With dead ends: 201 [2018-09-23 21:23:14,592 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 21:23:14,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:23:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 21:23:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 21:23:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 21:23:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-23 21:23:14,598 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-09-23 21:23:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:14,599 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-23 21:23:14,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:23:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-23 21:23:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 21:23:14,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:14,601 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-23 21:23:14,601 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:14,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times [2018-09-23 21:23:14,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:14,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:14,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:14,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-09-23 21:23:15,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:15,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:15,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:15,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:15,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:15,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-09-23 21:23:15,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:15,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:23:15,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:23:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:23:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:15,837 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states. [2018-09-23 21:23:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:15,986 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-09-23 21:23:15,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:23:15,987 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-09-23 21:23:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:15,988 INFO L225 Difference]: With dead ends: 207 [2018-09-23 21:23:15,988 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 21:23:15,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 21:23:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 21:23:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 21:23:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-23 21:23:15,994 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-09-23 21:23:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:15,994 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-23 21:23:15,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:23:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-23 21:23:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 21:23:15,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:15,995 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-23 21:23:15,995 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:15,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times [2018-09-23 21:23:15,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:15,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:15,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:15,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-09-23 21:23:16,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:16,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:16,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:17,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 21:23:17,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:17,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-09-23 21:23:17,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:17,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:23:17,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:23:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:23:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:17,063 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2018-09-23 21:23:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:17,240 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2018-09-23 21:23:17,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:23:17,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-09-23 21:23:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:17,241 INFO L225 Difference]: With dead ends: 213 [2018-09-23 21:23:17,242 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:23:17,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:23:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 21:23:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 21:23:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-23 21:23:17,247 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2018-09-23 21:23:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:17,247 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-23 21:23:17,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:23:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-23 21:23:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 21:23:17,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:17,248 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-23 21:23:17,248 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:17,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times [2018-09-23 21:23:17,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:17,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:17,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:17,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:17,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-09-23 21:23:18,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:18,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:18,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:18,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:18,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:18,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-09-23 21:23:18,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:18,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:23:18,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:23:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:23:18,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:18,580 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states. [2018-09-23 21:23:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:18,846 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-09-23 21:23:18,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:23:18,847 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-09-23 21:23:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:18,847 INFO L225 Difference]: With dead ends: 219 [2018-09-23 21:23:18,848 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:23:18,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:23:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 21:23:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 21:23:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-23 21:23:18,852 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2018-09-23 21:23:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:18,853 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-23 21:23:18,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:23:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-23 21:23:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 21:23:18,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:18,854 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-23 21:23:18,854 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:18,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times [2018-09-23 21:23:18,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:18,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:18,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:18,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-09-23 21:23:19,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:19,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:19,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:20,148 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 21:23:20,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:20,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-09-23 21:23:20,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:20,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:23:20,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:23:20,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:23:20,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:20,205 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states. [2018-09-23 21:23:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:20,360 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-23 21:23:20,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:23:20,360 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-09-23 21:23:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:20,362 INFO L225 Difference]: With dead ends: 225 [2018-09-23 21:23:20,362 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 21:23:20,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 21:23:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 21:23:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 21:23:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-23 21:23:20,368 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-09-23 21:23:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:20,368 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-23 21:23:20,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:23:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-23 21:23:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 21:23:20,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:20,369 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-23 21:23:20,370 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:20,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times [2018-09-23 21:23:20,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:20,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:20,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:20,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-09-23 21:23:21,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:21,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:21,070 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:21,377 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:23:21,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:21,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-09-23 21:23:21,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:21,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:23:21,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:23:21,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:23:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:21,434 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2018-09-23 21:23:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:21,709 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2018-09-23 21:23:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:23:21,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-09-23 21:23:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:21,710 INFO L225 Difference]: With dead ends: 231 [2018-09-23 21:23:21,710 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 21:23:21,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 21:23:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 21:23:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 21:23:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-23 21:23:21,715 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2018-09-23 21:23:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:21,715 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-23 21:23:21,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:23:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-23 21:23:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 21:23:21,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:21,716 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-23 21:23:21,717 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:21,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times [2018-09-23 21:23:21,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:21,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:21,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:21,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-09-23 21:23:23,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:23,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:23,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:23,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-09-23 21:23:23,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:23,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:23:23,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:23:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:23:23,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:23,215 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-09-23 21:23:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:24,405 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2018-09-23 21:23:24,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:23:24,405 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-09-23 21:23:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:24,406 INFO L225 Difference]: With dead ends: 237 [2018-09-23 21:23:24,407 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:23:24,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:23:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 21:23:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 21:23:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-23 21:23:24,413 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2018-09-23 21:23:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:24,413 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-23 21:23:24,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:23:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-23 21:23:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:23:24,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:24,414 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-23 21:23:24,414 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:24,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:24,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times [2018-09-23 21:23:24,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:24,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:24,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:24,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:24,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-09-23 21:23:25,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:25,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:25,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:25,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:25,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:25,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-09-23 21:23:25,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:25,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:23:25,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:23:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:23:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:25,485 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states. [2018-09-23 21:23:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:25,911 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2018-09-23 21:23:25,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:23:25,912 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-09-23 21:23:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:25,913 INFO L225 Difference]: With dead ends: 243 [2018-09-23 21:23:25,913 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 21:23:25,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 21:23:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 21:23:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 21:23:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-23 21:23:25,919 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-09-23 21:23:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:25,919 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-23 21:23:25,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:23:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-23 21:23:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 21:23:25,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:25,920 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-23 21:23:25,920 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:25,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times [2018-09-23 21:23:25,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:25,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:25,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:25,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:25,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-09-23 21:23:26,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:26,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:26,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:27,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 21:23:27,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:27,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-09-23 21:23:27,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:27,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:23:27,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:23:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:23:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:27,224 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states. [2018-09-23 21:23:27,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:27,384 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2018-09-23 21:23:27,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:23:27,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-09-23 21:23:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:27,386 INFO L225 Difference]: With dead ends: 249 [2018-09-23 21:23:27,386 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 21:23:27,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 21:23:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 21:23:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 21:23:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-23 21:23:27,392 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2018-09-23 21:23:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:27,393 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-23 21:23:27,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:23:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-23 21:23:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 21:23:27,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:27,394 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-23 21:23:27,394 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:27,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:27,394 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times [2018-09-23 21:23:27,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:27,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:27,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:27,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:27,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-09-23 21:23:28,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:28,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:28,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:28,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:28,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:28,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-09-23 21:23:28,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:28,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:23:28,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:23:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:23:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:28,624 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states. [2018-09-23 21:23:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:30,129 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-23 21:23:30,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:23:30,130 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-09-23 21:23:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:30,132 INFO L225 Difference]: With dead ends: 255 [2018-09-23 21:23:30,132 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:23:30,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:23:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 21:23:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 21:23:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-23 21:23:30,138 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2018-09-23 21:23:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:30,138 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-23 21:23:30,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:23:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-23 21:23:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 21:23:30,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:30,139 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-23 21:23:30,139 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:30,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times [2018-09-23 21:23:30,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:30,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:30,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:30,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:30,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-23 21:23:31,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:31,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:31,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:32,205 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 21:23:32,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:32,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-23 21:23:32,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:32,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:23:32,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:23:32,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:23:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:32,304 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states. [2018-09-23 21:23:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:32,470 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2018-09-23 21:23:32,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:23:32,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-09-23 21:23:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:32,472 INFO L225 Difference]: With dead ends: 261 [2018-09-23 21:23:32,472 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 21:23:32,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 21:23:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 21:23:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 21:23:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-23 21:23:32,477 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2018-09-23 21:23:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:32,477 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-23 21:23:32,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:23:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-23 21:23:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 21:23:32,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:32,479 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-23 21:23:32,479 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:32,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times [2018-09-23 21:23:32,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:32,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:32,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:32,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-09-23 21:23:33,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:33,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:33,639 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:34,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:23:34,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:34,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-09-23 21:23:34,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:34,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:23:34,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:23:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:23:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:23:34,177 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states. [2018-09-23 21:23:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:34,357 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2018-09-23 21:23:34,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:23:34,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-09-23 21:23:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:34,359 INFO L225 Difference]: With dead ends: 267 [2018-09-23 21:23:34,359 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 21:23:34,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:23:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 21:23:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 21:23:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 21:23:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-23 21:23:34,364 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2018-09-23 21:23:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:34,364 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-23 21:23:34,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:23:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-23 21:23:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 21:23:34,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:34,365 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-23 21:23:34,365 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:34,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times [2018-09-23 21:23:34,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:34,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:34,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:34,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-09-23 21:23:35,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:35,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:23:35,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:35,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-09-23 21:23:35,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:35,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:23:35,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:23:35,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:23:35,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:23:35,752 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states. [2018-09-23 21:23:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:35,986 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2018-09-23 21:23:35,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:23:35,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-09-23 21:23:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:35,988 INFO L225 Difference]: With dead ends: 273 [2018-09-23 21:23:35,988 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:23:35,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:23:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:23:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 21:23:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 21:23:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-23 21:23:35,993 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2018-09-23 21:23:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:35,993 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-23 21:23:35,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:23:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-23 21:23:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:23:35,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:35,994 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-23 21:23:35,994 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:35,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:35,995 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times [2018-09-23 21:23:35,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:35,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:35,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:35,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:35,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 21:23:36,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:36,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:36,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:36,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:36,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:36,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 21:23:36,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:36,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:23:36,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:23:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:23:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:23:36,987 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states. [2018-09-23 21:23:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:37,195 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2018-09-23 21:23:37,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:23:37,196 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-09-23 21:23:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:37,197 INFO L225 Difference]: With dead ends: 279 [2018-09-23 21:23:37,197 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 21:23:37,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:23:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 21:23:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 21:23:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 21:23:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-23 21:23:37,203 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2018-09-23 21:23:37,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:37,203 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-23 21:23:37,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:23:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-23 21:23:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 21:23:37,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:37,204 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-23 21:23:37,204 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:37,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times [2018-09-23 21:23:37,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:37,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:37,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:37,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-09-23 21:23:38,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:38,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:38,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:39,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 21:23:39,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:39,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-09-23 21:23:39,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:39,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:23:39,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:23:39,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:23:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:23:39,616 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states. [2018-09-23 21:23:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:39,894 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-09-23 21:23:39,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:23:39,894 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-09-23 21:23:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:39,896 INFO L225 Difference]: With dead ends: 285 [2018-09-23 21:23:39,896 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 21:23:39,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:23:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 21:23:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 21:23:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 21:23:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-23 21:23:39,902 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2018-09-23 21:23:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:39,902 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-23 21:23:39,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:23:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-23 21:23:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 21:23:39,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:39,903 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-23 21:23:39,904 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:39,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:39,904 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times [2018-09-23 21:23:39,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:39,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:39,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:39,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:39,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-09-23 21:23:41,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:41,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:41,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:41,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:41,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:41,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-09-23 21:23:41,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:41,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:23:41,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:23:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:23:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:41,762 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states. [2018-09-23 21:23:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:42,020 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2018-09-23 21:23:42,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:23:42,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-09-23 21:23:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:42,022 INFO L225 Difference]: With dead ends: 291 [2018-09-23 21:23:42,022 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:23:42,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:23:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 21:23:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 21:23:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-23 21:23:42,027 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2018-09-23 21:23:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:42,027 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-23 21:23:42,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:23:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-23 21:23:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 21:23:42,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:42,029 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-23 21:23:42,029 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:42,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times [2018-09-23 21:23:42,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:42,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:42,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:42,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:42,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-09-23 21:23:43,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:43,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:43,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:44,506 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 21:23:44,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:44,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-09-23 21:23:44,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:44,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:23:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:23:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:23:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:44,589 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states. [2018-09-23 21:23:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:45,088 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2018-09-23 21:23:45,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:23:45,089 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-09-23 21:23:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:45,090 INFO L225 Difference]: With dead ends: 297 [2018-09-23 21:23:45,090 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 21:23:45,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 21:23:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 21:23:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 21:23:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-23 21:23:45,096 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2018-09-23 21:23:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:45,096 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-23 21:23:45,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:23:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-23 21:23:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 21:23:45,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:45,097 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-23 21:23:45,097 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:45,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times [2018-09-23 21:23:45,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:45,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:45,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:45,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:45,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-09-23 21:23:46,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:46,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:46,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:46,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:23:46,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:46,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-09-23 21:23:47,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:47,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:23:47,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:23:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:23:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:47,052 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states. [2018-09-23 21:23:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:47,375 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2018-09-23 21:23:47,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:23:47,375 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-09-23 21:23:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:47,377 INFO L225 Difference]: With dead ends: 303 [2018-09-23 21:23:47,377 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 21:23:47,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 21:23:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 21:23:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 21:23:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-23 21:23:47,381 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-09-23 21:23:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:47,382 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-23 21:23:47,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:23:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-23 21:23:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 21:23:47,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:47,383 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-23 21:23:47,383 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:47,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times [2018-09-23 21:23:47,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:47,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:47,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:47,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:47,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-09-23 21:23:48,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:48,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:48,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:48,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-09-23 21:23:48,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:48,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:23:48,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:23:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:23:48,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:48,830 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states. [2018-09-23 21:23:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:49,130 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2018-09-23 21:23:49,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:23:49,130 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-09-23 21:23:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:49,132 INFO L225 Difference]: With dead ends: 309 [2018-09-23 21:23:49,132 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 21:23:49,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 21:23:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-23 21:23:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-23 21:23:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-23 21:23:49,138 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-09-23 21:23:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:49,138 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-23 21:23:49,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:23:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-23 21:23:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 21:23:49,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:49,140 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-23 21:23:49,140 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:49,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times [2018-09-23 21:23:49,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:49,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:49,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:49,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:49,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-09-23 21:23:50,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:50,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:50,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:50,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:50,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:50,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-09-23 21:23:50,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:50,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:23:50,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:23:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:23:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:50,551 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states. [2018-09-23 21:23:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:51,474 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-09-23 21:23:51,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:23:51,475 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-09-23 21:23:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:51,476 INFO L225 Difference]: With dead ends: 315 [2018-09-23 21:23:51,476 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 21:23:51,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 21:23:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 21:23:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 21:23:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-09-23 21:23:51,483 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2018-09-23 21:23:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:51,483 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-09-23 21:23:51,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:23:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-09-23 21:23:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-23 21:23:51,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:51,484 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-09-23 21:23:51,485 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:51,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times [2018-09-23 21:23:51,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:51,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:51,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:51,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:51,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-09-23 21:23:52,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:52,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:52,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:53,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 21:23:53,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:53,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-09-23 21:23:53,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:53,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:23:53,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:23:53,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:23:53,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:23:53,922 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states. [2018-09-23 21:23:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:54,777 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-09-23 21:23:54,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:23:54,777 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-09-23 21:23:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:54,779 INFO L225 Difference]: With dead ends: 321 [2018-09-23 21:23:54,779 INFO L226 Difference]: Without dead ends: 215 [2018-09-23 21:23:54,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:23:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-23 21:23:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-23 21:23:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 21:23:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-09-23 21:23:54,785 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2018-09-23 21:23:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:54,785 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-09-23 21:23:54,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:23:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-09-23 21:23:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-23 21:23:54,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:54,786 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-09-23 21:23:54,787 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:54,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times [2018-09-23 21:23:54,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:54,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:54,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:54,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:54,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-09-23 21:23:55,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:55,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:55,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:55,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:55,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:55,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-09-23 21:23:56,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:56,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:23:56,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:23:56,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:23:56,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:23:56,069 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states. [2018-09-23 21:23:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:56,367 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2018-09-23 21:23:56,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:23:56,367 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-09-23 21:23:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:56,369 INFO L225 Difference]: With dead ends: 327 [2018-09-23 21:23:56,369 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 21:23:56,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:23:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 21:23:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-23 21:23:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 21:23:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-09-23 21:23:56,376 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2018-09-23 21:23:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:56,376 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-09-23 21:23:56,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:23:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-09-23 21:23:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 21:23:56,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:56,378 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-09-23 21:23:56,378 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:56,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times [2018-09-23 21:23:56,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:56,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:56,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:56,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:56,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-09-23 21:23:57,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:57,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:57,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:59,342 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 21:23:59,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:59,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-09-23 21:23:59,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:59,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:23:59,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:23:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:23:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:23:59,433 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states. [2018-09-23 21:23:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:59,837 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2018-09-23 21:23:59,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:23:59,838 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-09-23 21:23:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:59,839 INFO L225 Difference]: With dead ends: 333 [2018-09-23 21:23:59,839 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 21:23:59,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:23:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 21:23:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-23 21:23:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-23 21:23:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-09-23 21:23:59,844 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2018-09-23 21:23:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:59,844 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-09-23 21:23:59,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:23:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-09-23 21:23:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-23 21:23:59,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:59,845 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-09-23 21:23:59,845 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:59,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times [2018-09-23 21:23:59,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:59,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:59,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:59,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:59,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 21:24:01,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:01,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:01,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:02,105 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 21:24:02,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:02,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 21:24:02,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:02,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:24:02,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:24:02,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:24:02,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:24:02,179 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states. [2018-09-23 21:24:02,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:02,539 INFO L93 Difference]: Finished difference Result 339 states and 342 transitions. [2018-09-23 21:24:02,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:24:02,540 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-09-23 21:24:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:02,541 INFO L225 Difference]: With dead ends: 339 [2018-09-23 21:24:02,541 INFO L226 Difference]: Without dead ends: 227 [2018-09-23 21:24:02,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:24:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-23 21:24:02,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-23 21:24:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-23 21:24:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-09-23 21:24:02,547 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2018-09-23 21:24:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:02,547 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-09-23 21:24:02,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:24:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-09-23 21:24:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-23 21:24:02,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:02,549 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-09-23 21:24:02,549 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:02,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times [2018-09-23 21:24:02,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:02,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:02,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:02,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:02,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 21:24:04,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:04,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:04,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:04,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 21:24:04,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:04,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:24:04,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:24:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:24:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:24:04,556 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states. [2018-09-23 21:24:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:04,839 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-09-23 21:24:04,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:24:04,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-09-23 21:24:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:04,841 INFO L225 Difference]: With dead ends: 345 [2018-09-23 21:24:04,841 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 21:24:04,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:24:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 21:24:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-23 21:24:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-23 21:24:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-09-23 21:24:04,848 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2018-09-23 21:24:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:04,849 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-09-23 21:24:04,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:24:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-09-23 21:24:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-23 21:24:04,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:04,850 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-09-23 21:24:04,850 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:04,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times [2018-09-23 21:24:04,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:04,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:04,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-09-23 21:24:06,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:06,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:06,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:06,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:06,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:06,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-09-23 21:24:06,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:06,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:24:06,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:24:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:24:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:24:06,431 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states. [2018-09-23 21:24:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:06,832 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2018-09-23 21:24:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:24:06,832 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-09-23 21:24:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:06,834 INFO L225 Difference]: With dead ends: 351 [2018-09-23 21:24:06,834 INFO L226 Difference]: Without dead ends: 235 [2018-09-23 21:24:06,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:24:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-23 21:24:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-23 21:24:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-23 21:24:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-09-23 21:24:06,839 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2018-09-23 21:24:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:06,839 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-09-23 21:24:06,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:24:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-09-23 21:24:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-23 21:24:06,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:06,841 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-09-23 21:24:06,841 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:06,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:06,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times [2018-09-23 21:24:06,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:06,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:06,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:06,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:06,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-09-23 21:24:08,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:08,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:08,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:09,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 21:24:09,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:09,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-09-23 21:24:10,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:10,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:24:10,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:24:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:24:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:24:10,054 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states. [2018-09-23 21:24:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:10,572 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2018-09-23 21:24:10,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:24:10,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-09-23 21:24:10,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:10,573 INFO L225 Difference]: With dead ends: 357 [2018-09-23 21:24:10,574 INFO L226 Difference]: Without dead ends: 239 [2018-09-23 21:24:10,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:24:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-23 21:24:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-23 21:24:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-23 21:24:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-09-23 21:24:10,579 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2018-09-23 21:24:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:10,579 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-09-23 21:24:10,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:24:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-09-23 21:24:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-23 21:24:10,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:10,580 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-09-23 21:24:10,580 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:10,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times [2018-09-23 21:24:10,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:10,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:10,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:10,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-09-23 21:24:12,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:12,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:12,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:12,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:12,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:12,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-09-23 21:24:12,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:12,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:24:12,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:24:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:24:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:24:12,243 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states. [2018-09-23 21:24:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:12,607 INFO L93 Difference]: Finished difference Result 363 states and 366 transitions. [2018-09-23 21:24:12,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:24:12,607 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-09-23 21:24:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:12,609 INFO L225 Difference]: With dead ends: 363 [2018-09-23 21:24:12,609 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 21:24:12,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:24:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 21:24:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-23 21:24:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-23 21:24:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-09-23 21:24:12,614 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2018-09-23 21:24:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:12,614 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-09-23 21:24:12,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:24:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-09-23 21:24:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-23 21:24:12,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:12,616 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-09-23 21:24:12,616 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:12,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times [2018-09-23 21:24:12,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:12,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:12,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:12,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:12,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-09-23 21:24:14,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:14,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:14,640 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:17,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 21:24:17,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:17,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-09-23 21:24:17,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:17,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:24:17,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:24:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:24:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:24:17,308 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states. [2018-09-23 21:24:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:17,769 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2018-09-23 21:24:17,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:24:17,770 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-09-23 21:24:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:17,771 INFO L225 Difference]: With dead ends: 369 [2018-09-23 21:24:17,771 INFO L226 Difference]: Without dead ends: 247 [2018-09-23 21:24:17,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:24:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-23 21:24:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-23 21:24:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-23 21:24:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-09-23 21:24:17,778 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2018-09-23 21:24:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:17,778 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-09-23 21:24:17,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:24:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-09-23 21:24:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-23 21:24:17,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:17,780 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-09-23 21:24:17,780 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:17,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times [2018-09-23 21:24:17,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:17,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:17,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:17,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:17,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-09-23 21:24:19,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:19,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:19,784 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:21,296 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 21:24:21,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:21,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-09-23 21:24:21,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:21,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:24:21,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:24:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:24:21,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:24:21,399 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states. [2018-09-23 21:24:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:21,780 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-09-23 21:24:21,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:24:21,781 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-09-23 21:24:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:21,782 INFO L225 Difference]: With dead ends: 375 [2018-09-23 21:24:21,782 INFO L226 Difference]: Without dead ends: 251 [2018-09-23 21:24:21,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:24:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-23 21:24:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-23 21:24:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-23 21:24:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-09-23 21:24:21,788 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2018-09-23 21:24:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:21,788 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-09-23 21:24:21,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:24:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-09-23 21:24:21,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-23 21:24:21,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:21,789 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-09-23 21:24:21,790 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:21,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:21,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times [2018-09-23 21:24:21,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:21,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:21,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:21,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:21,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-09-23 21:24:23,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:23,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:23,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:23,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-09-23 21:24:23,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:23,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:24:23,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:24:23,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:24:23,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:24:23,497 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states. [2018-09-23 21:24:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:23,834 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2018-09-23 21:24:23,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:24:23,834 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-09-23 21:24:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:23,836 INFO L225 Difference]: With dead ends: 381 [2018-09-23 21:24:23,836 INFO L226 Difference]: Without dead ends: 255 [2018-09-23 21:24:23,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:24:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-23 21:24:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-23 21:24:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-23 21:24:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-09-23 21:24:23,841 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2018-09-23 21:24:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:23,841 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-09-23 21:24:23,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:24:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-09-23 21:24:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-23 21:24:23,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:23,842 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-09-23 21:24:23,843 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:23,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times [2018-09-23 21:24:23,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:23,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:23,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:23,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:23,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-09-23 21:24:25,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:25,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:25,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:25,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:25,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:25,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-09-23 21:24:25,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:25,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:24:25,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:24:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:24:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:24:25,844 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states. [2018-09-23 21:24:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:26,389 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2018-09-23 21:24:26,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:24:26,389 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-09-23 21:24:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:26,391 INFO L225 Difference]: With dead ends: 387 [2018-09-23 21:24:26,391 INFO L226 Difference]: Without dead ends: 259 [2018-09-23 21:24:26,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:24:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-23 21:24:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-23 21:24:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-23 21:24:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-09-23 21:24:26,396 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2018-09-23 21:24:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:26,397 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-09-23 21:24:26,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:24:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-09-23 21:24:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-23 21:24:26,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,398 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-09-23 21:24:26,399 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times [2018-09-23 21:24:26,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:26,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-09-23 21:24:27,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:27,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:27,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:30,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 21:24:30,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:30,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-09-23 21:24:30,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:30,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:24:30,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:24:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:24:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:24:30,497 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states. [2018-09-23 21:24:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:31,015 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2018-09-23 21:24:31,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:24:31,015 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-09-23 21:24:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:31,016 INFO L225 Difference]: With dead ends: 393 [2018-09-23 21:24:31,016 INFO L226 Difference]: Without dead ends: 263 [2018-09-23 21:24:31,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:24:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-23 21:24:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-23 21:24:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-23 21:24:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-09-23 21:24:31,023 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2018-09-23 21:24:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:31,023 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-09-23 21:24:31,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:24:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-09-23 21:24:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-23 21:24:31,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:31,025 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-09-23 21:24:31,025 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:31,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times [2018-09-23 21:24:31,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:31,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:31,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:31,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:31,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-09-23 21:24:32,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:32,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:32,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:32,712 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:32,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:32,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-09-23 21:24:32,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:32,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:24:32,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:24:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:24:32,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:24:32,780 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states. [2018-09-23 21:24:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:33,300 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2018-09-23 21:24:33,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:24:33,301 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-09-23 21:24:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:33,303 INFO L225 Difference]: With dead ends: 399 [2018-09-23 21:24:33,303 INFO L226 Difference]: Without dead ends: 267 [2018-09-23 21:24:33,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:24:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-23 21:24:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-23 21:24:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-23 21:24:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-09-23 21:24:33,309 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2018-09-23 21:24:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:33,309 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-09-23 21:24:33,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:24:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-09-23 21:24:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-23 21:24:33,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:33,311 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-09-23 21:24:33,311 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:33,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times [2018-09-23 21:24:33,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:33,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:33,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:33,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:33,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-23 21:24:35,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:35,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:35,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:38,757 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 21:24:38,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:38,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-23 21:24:38,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:38,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:24:38,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:24:38,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:24:38,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:24:38,855 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states. [2018-09-23 21:24:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:39,399 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-09-23 21:24:39,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:24:39,399 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-09-23 21:24:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:39,400 INFO L225 Difference]: With dead ends: 405 [2018-09-23 21:24:39,401 INFO L226 Difference]: Without dead ends: 271 [2018-09-23 21:24:39,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:24:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-23 21:24:39,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-23 21:24:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-23 21:24:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-09-23 21:24:39,406 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-09-23 21:24:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:39,406 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-09-23 21:24:39,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:24:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-09-23 21:24:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-23 21:24:39,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:39,408 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-09-23 21:24:39,408 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:39,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times [2018-09-23 21:24:39,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:39,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:39,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:39,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-09-23 21:24:41,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:41,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:41,213 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:43,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 21:24:43,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:43,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-09-23 21:24:43,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:43,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:24:43,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:24:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:24:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:24:43,107 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states. [2018-09-23 21:24:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:43,678 INFO L93 Difference]: Finished difference Result 411 states and 414 transitions. [2018-09-23 21:24:43,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:24:43,679 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-09-23 21:24:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:43,680 INFO L225 Difference]: With dead ends: 411 [2018-09-23 21:24:43,681 INFO L226 Difference]: Without dead ends: 275 [2018-09-23 21:24:43,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:24:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-23 21:24:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-23 21:24:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-23 21:24:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-09-23 21:24:43,686 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-09-23 21:24:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:43,686 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-09-23 21:24:43,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:24:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-09-23 21:24:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-23 21:24:43,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:43,688 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-09-23 21:24:43,688 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:43,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times [2018-09-23 21:24:43,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:43,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-09-23 21:24:45,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:45,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:45,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:45,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-09-23 21:24:45,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:45,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:24:45,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:24:45,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:24:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:24:45,895 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states. [2018-09-23 21:24:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:46,597 INFO L93 Difference]: Finished difference Result 417 states and 420 transitions. [2018-09-23 21:24:46,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:24:46,597 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-09-23 21:24:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:46,599 INFO L225 Difference]: With dead ends: 417 [2018-09-23 21:24:46,599 INFO L226 Difference]: Without dead ends: 279 [2018-09-23 21:24:46,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:24:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-23 21:24:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-23 21:24:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-23 21:24:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-09-23 21:24:46,604 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2018-09-23 21:24:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:46,605 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-09-23 21:24:46,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:24:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-09-23 21:24:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-23 21:24:46,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:46,606 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-09-23 21:24:46,607 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:46,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times [2018-09-23 21:24:46,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:46,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:46,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:46,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:46,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-09-23 21:24:48,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:48,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:48,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:48,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:48,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:48,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-09-23 21:24:48,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:48,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:24:48,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:24:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:24:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:24:48,656 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states. [2018-09-23 21:24:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:49,165 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2018-09-23 21:24:49,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:24:49,165 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-09-23 21:24:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:49,166 INFO L225 Difference]: With dead ends: 423 [2018-09-23 21:24:49,166 INFO L226 Difference]: Without dead ends: 283 [2018-09-23 21:24:49,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:24:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-23 21:24:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-23 21:24:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-23 21:24:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-09-23 21:24:49,172 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2018-09-23 21:24:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:49,172 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-09-23 21:24:49,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:24:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-09-23 21:24:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-23 21:24:49,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:49,173 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-09-23 21:24:49,173 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:49,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times [2018-09-23 21:24:49,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:49,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:49,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:49,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:49,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-09-23 21:24:51,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:51,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:51,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:54,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 21:24:54,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:54,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-09-23 21:24:54,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:54,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:24:54,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:24:54,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:24:54,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:24:54,803 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states. [2018-09-23 21:24:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:55,357 INFO L93 Difference]: Finished difference Result 429 states and 432 transitions. [2018-09-23 21:24:55,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:24:55,357 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-09-23 21:24:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:55,359 INFO L225 Difference]: With dead ends: 429 [2018-09-23 21:24:55,359 INFO L226 Difference]: Without dead ends: 287 [2018-09-23 21:24:55,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:24:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-23 21:24:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-23 21:24:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-23 21:24:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-09-23 21:24:55,364 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2018-09-23 21:24:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:55,364 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-09-23 21:24:55,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:24:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-09-23 21:24:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-23 21:24:55,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:55,366 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-09-23 21:24:55,366 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:55,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times [2018-09-23 21:24:55,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:55,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:55,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:55,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:55,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-09-23 21:24:57,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:57,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:57,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:57,385 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:57,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:57,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-09-23 21:24:57,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:57,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:24:57,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:24:57,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:24:57,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:24:57,465 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states. [2018-09-23 21:24:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:58,187 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-09-23 21:24:58,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:24:58,188 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-09-23 21:24:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:58,189 INFO L225 Difference]: With dead ends: 435 [2018-09-23 21:24:58,189 INFO L226 Difference]: Without dead ends: 291 [2018-09-23 21:24:58,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:24:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-23 21:24:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-23 21:24:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-23 21:24:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-09-23 21:24:58,193 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2018-09-23 21:24:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:58,193 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-09-23 21:24:58,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:24:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-09-23 21:24:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-23 21:24:58,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:58,195 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-09-23 21:24:58,195 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:58,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times [2018-09-23 21:24:58,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:58,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:58,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:58,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:58,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-09-23 21:25:00,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:00,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:00,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:05,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 21:25:05,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:05,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-09-23 21:25:05,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:05,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:25:05,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:25:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:25:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:25:05,671 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states. [2018-09-23 21:25:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:06,348 INFO L93 Difference]: Finished difference Result 441 states and 444 transitions. [2018-09-23 21:25:06,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:25:06,349 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-09-23 21:25:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:06,351 INFO L225 Difference]: With dead ends: 441 [2018-09-23 21:25:06,351 INFO L226 Difference]: Without dead ends: 295 [2018-09-23 21:25:06,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:25:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-23 21:25:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-23 21:25:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-23 21:25:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-09-23 21:25:06,358 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2018-09-23 21:25:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:06,358 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-09-23 21:25:06,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:25:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-09-23 21:25:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-23 21:25:06,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:06,360 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-09-23 21:25:06,360 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:06,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times [2018-09-23 21:25:06,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:06,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:06,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:06,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:06,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-09-23 21:25:08,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:08,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:08,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:11,238 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 21:25:11,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:11,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-09-23 21:25:11,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:11,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:25:11,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:25:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:25:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:25:11,329 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states. [2018-09-23 21:25:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:12,034 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2018-09-23 21:25:12,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:25:12,035 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-09-23 21:25:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:12,036 INFO L225 Difference]: With dead ends: 447 [2018-09-23 21:25:12,036 INFO L226 Difference]: Without dead ends: 299 [2018-09-23 21:25:12,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:25:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-23 21:25:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-23 21:25:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-23 21:25:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-09-23 21:25:12,042 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2018-09-23 21:25:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:12,043 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-09-23 21:25:12,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:25:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-09-23 21:25:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-23 21:25:12,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:12,045 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-09-23 21:25:12,045 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:12,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times [2018-09-23 21:25:12,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:12,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:12,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:12,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-09-23 21:25:14,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:14,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:14,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:14,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-09-23 21:25:14,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:14,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:25:14,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:25:14,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:25:14,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:25:14,327 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states. [2018-09-23 21:25:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:14,940 INFO L93 Difference]: Finished difference Result 453 states and 456 transitions. [2018-09-23 21:25:14,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:25:14,941 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-09-23 21:25:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:14,942 INFO L225 Difference]: With dead ends: 453 [2018-09-23 21:25:14,942 INFO L226 Difference]: Without dead ends: 303 [2018-09-23 21:25:14,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:25:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-23 21:25:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-23 21:25:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-23 21:25:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-09-23 21:25:14,949 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2018-09-23 21:25:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:14,949 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-09-23 21:25:14,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:25:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-09-23 21:25:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-23 21:25:14,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:14,951 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-09-23 21:25:14,951 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:14,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:14,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times [2018-09-23 21:25:14,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:14,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:14,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:14,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:14,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-09-23 21:25:17,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:17,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:17,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:17,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:17,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:17,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-09-23 21:25:17,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:17,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:25:17,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:25:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:25:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:25:17,620 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states. [2018-09-23 21:25:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:18,346 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-09-23 21:25:18,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:25:18,346 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-09-23 21:25:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:18,348 INFO L225 Difference]: With dead ends: 459 [2018-09-23 21:25:18,348 INFO L226 Difference]: Without dead ends: 307 [2018-09-23 21:25:18,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:25:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-23 21:25:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-23 21:25:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-23 21:25:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-09-23 21:25:18,354 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2018-09-23 21:25:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:18,354 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-09-23 21:25:18,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:25:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-09-23 21:25:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-23 21:25:18,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:18,355 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-09-23 21:25:18,355 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:18,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times [2018-09-23 21:25:18,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:18,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:18,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:18,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:18,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-09-23 21:25:20,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:20,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:20,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:25,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 21:25:25,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:25,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-09-23 21:25:25,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:25,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:25:25,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:25:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:25:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:25:25,475 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states. [2018-09-23 21:25:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:26,270 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2018-09-23 21:25:26,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:25:26,271 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-09-23 21:25:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:26,273 INFO L225 Difference]: With dead ends: 465 [2018-09-23 21:25:26,273 INFO L226 Difference]: Without dead ends: 311 [2018-09-23 21:25:26,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:25:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-23 21:25:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-23 21:25:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-23 21:25:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-09-23 21:25:26,278 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2018-09-23 21:25:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:26,278 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-09-23 21:25:26,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:25:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-09-23 21:25:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-23 21:25:26,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:26,279 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-09-23 21:25:26,280 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:26,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times [2018-09-23 21:25:26,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:26,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:26,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-09-23 21:25:28,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:28,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:28,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:28,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:28,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:28,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-09-23 21:25:28,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:28,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:25:28,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:25:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:25:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:25:28,694 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states. [2018-09-23 21:25:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:29,494 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2018-09-23 21:25:29,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:25:29,495 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-09-23 21:25:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:29,497 INFO L225 Difference]: With dead ends: 471 [2018-09-23 21:25:29,497 INFO L226 Difference]: Without dead ends: 315 [2018-09-23 21:25:29,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:25:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-23 21:25:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-23 21:25:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-23 21:25:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-09-23 21:25:29,502 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2018-09-23 21:25:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:29,502 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-09-23 21:25:29,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:25:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-09-23 21:25:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-23 21:25:29,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:29,504 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-09-23 21:25:29,504 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:29,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times [2018-09-23 21:25:29,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:29,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:29,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-09-23 21:25:32,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:32,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:32,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:41,460 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 21:25:41,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:41,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-09-23 21:25:41,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:41,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:25:41,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:25:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:25:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:25:41,555 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states. [2018-09-23 21:25:42,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:42,430 INFO L93 Difference]: Finished difference Result 477 states and 480 transitions. [2018-09-23 21:25:42,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:25:42,431 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-09-23 21:25:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:42,433 INFO L225 Difference]: With dead ends: 477 [2018-09-23 21:25:42,433 INFO L226 Difference]: Without dead ends: 319 [2018-09-23 21:25:42,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:25:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-23 21:25:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-23 21:25:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-23 21:25:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-09-23 21:25:42,439 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2018-09-23 21:25:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:42,439 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-09-23 21:25:42,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:25:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-09-23 21:25:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-23 21:25:42,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:42,440 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-09-23 21:25:42,440 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:42,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:42,441 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times [2018-09-23 21:25:42,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:42,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:42,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:42,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:42,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-09-23 21:25:45,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:45,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:45,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:48,624 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 21:25:48,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:48,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-09-23 21:25:48,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:48,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:25:48,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:25:48,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:25:48,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:25:48,723 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states. [2018-09-23 21:25:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:49,472 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2018-09-23 21:25:49,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:25:49,472 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-09-23 21:25:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:49,474 INFO L225 Difference]: With dead ends: 483 [2018-09-23 21:25:49,474 INFO L226 Difference]: Without dead ends: 323 [2018-09-23 21:25:49,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:25:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-23 21:25:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-23 21:25:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-23 21:25:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-09-23 21:25:49,480 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2018-09-23 21:25:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:49,480 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-09-23 21:25:49,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:25:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-09-23 21:25:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-23 21:25:49,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:49,482 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-09-23 21:25:49,482 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:49,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:49,482 INFO L82 PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times [2018-09-23 21:25:49,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:49,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:49,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:49,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:49,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-09-23 21:25:52,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:52,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:52,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:52,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-09-23 21:25:52,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:52,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:25:52,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:25:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:25:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:25:52,350 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states. [2018-09-23 21:25:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:53,334 INFO L93 Difference]: Finished difference Result 489 states and 492 transitions. [2018-09-23 21:25:53,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:25:53,335 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-09-23 21:25:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:53,337 INFO L225 Difference]: With dead ends: 489 [2018-09-23 21:25:53,337 INFO L226 Difference]: Without dead ends: 327 [2018-09-23 21:25:53,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:25:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-23 21:25:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-23 21:25:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-23 21:25:53,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-09-23 21:25:53,343 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2018-09-23 21:25:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:53,344 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-09-23 21:25:53,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:25:53,344 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-09-23 21:25:53,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-23 21:25:53,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:53,345 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-09-23 21:25:53,346 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:53,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:53,346 INFO L82 PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times [2018-09-23 21:25:53,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:53,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:53,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:53,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:53,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-09-23 21:25:55,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:55,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:55,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:55,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:55,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:55,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-09-23 21:25:55,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:55,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 21:25:55,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:25:55,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:25:55,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:25:55,981 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states. [2018-09-23 21:25:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:56,901 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2018-09-23 21:25:56,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:25:56,901 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-09-23 21:25:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:56,903 INFO L225 Difference]: With dead ends: 495 [2018-09-23 21:25:56,903 INFO L226 Difference]: Without dead ends: 331 [2018-09-23 21:25:56,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:25:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-23 21:25:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-23 21:25:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-23 21:25:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-09-23 21:25:56,909 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2018-09-23 21:25:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:56,909 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-09-23 21:25:56,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:25:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-09-23 21:25:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-23 21:25:56,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:56,911 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-09-23 21:25:56,911 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:56,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times [2018-09-23 21:25:56,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:56,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:56,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:56,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-09-23 21:25:59,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:59,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:59,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:05,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-23 21:26:05,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:05,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-09-23 21:26:05,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:05,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:26:05,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:26:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:26:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:26:05,718 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states. [2018-09-23 21:26:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:06,639 INFO L93 Difference]: Finished difference Result 501 states and 504 transitions. [2018-09-23 21:26:06,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:26:06,639 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-09-23 21:26:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:06,641 INFO L225 Difference]: With dead ends: 501 [2018-09-23 21:26:06,641 INFO L226 Difference]: Without dead ends: 335 [2018-09-23 21:26:06,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:26:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-23 21:26:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-23 21:26:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-23 21:26:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-09-23 21:26:06,646 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2018-09-23 21:26:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:06,646 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-09-23 21:26:06,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:26:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-09-23 21:26:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-23 21:26:06,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:06,648 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1] [2018-09-23 21:26:06,648 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:06,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times [2018-09-23 21:26:06,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:06,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:06,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:06,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:06,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-09-23 21:26:09,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:09,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:09,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:09,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:09,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:09,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-09-23 21:26:09,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:09,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 21:26:09,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:26:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:26:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:26:09,535 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states. [2018-09-23 21:26:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:10,393 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2018-09-23 21:26:10,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:26:10,394 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-09-23 21:26:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:10,396 INFO L225 Difference]: With dead ends: 507 [2018-09-23 21:26:10,396 INFO L226 Difference]: Without dead ends: 339 [2018-09-23 21:26:10,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:26:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-23 21:26:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-23 21:26:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-23 21:26:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-09-23 21:26:10,402 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-09-23 21:26:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:10,402 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-09-23 21:26:10,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:26:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-09-23 21:26:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-23 21:26:10,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:10,403 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-09-23 21:26:10,403 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:10,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:10,404 INFO L82 PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times [2018-09-23 21:26:10,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:10,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:10,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:10,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:10,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-09-23 21:26:13,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:13,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:13,428 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:22,466 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-23 21:26:22,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:22,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-09-23 21:26:22,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:22,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:26:22,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:26:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:26:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:26:22,592 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states. [2018-09-23 21:26:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:23,559 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2018-09-23 21:26:23,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:26:23,560 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-09-23 21:26:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:23,561 INFO L225 Difference]: With dead ends: 513 [2018-09-23 21:26:23,561 INFO L226 Difference]: Without dead ends: 343 [2018-09-23 21:26:23,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:26:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-23 21:26:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-23 21:26:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-23 21:26:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-09-23 21:26:23,567 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-09-23 21:26:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:23,568 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-09-23 21:26:23,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:26:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-09-23 21:26:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-23 21:26:23,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:23,569 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1] [2018-09-23 21:26:23,569 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:23,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:23,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times [2018-09-23 21:26:23,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:23,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:23,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:23,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:23,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-09-23 21:26:26,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:26,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:26,228 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:30,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-23 21:26:30,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:30,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-09-23 21:26:30,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:30,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 21:26:30,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:26:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:26:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:26:30,960 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states. [2018-09-23 21:26:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:32,062 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2018-09-23 21:26:32,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:26:32,062 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-09-23 21:26:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:32,064 INFO L225 Difference]: With dead ends: 519 [2018-09-23 21:26:32,064 INFO L226 Difference]: Without dead ends: 347 [2018-09-23 21:26:32,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:26:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-23 21:26:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-23 21:26:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-23 21:26:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2018-09-23 21:26:32,071 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2018-09-23 21:26:32,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:32,071 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2018-09-23 21:26:32,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:26:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2018-09-23 21:26:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-23 21:26:32,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:32,073 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1] [2018-09-23 21:26:32,073 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:32,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:32,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times [2018-09-23 21:26:32,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:32,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:32,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:32,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:32,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-09-23 21:26:34,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:34,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:34,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:34,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-09-23 21:26:35,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:35,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:26:35,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:26:35,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:26:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:26:35,077 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states. [2018-09-23 21:26:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:36,004 INFO L93 Difference]: Finished difference Result 525 states and 528 transitions. [2018-09-23 21:26:36,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:26:36,005 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-09-23 21:26:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:36,007 INFO L225 Difference]: With dead ends: 525 [2018-09-23 21:26:36,007 INFO L226 Difference]: Without dead ends: 351 [2018-09-23 21:26:36,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:26:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-23 21:26:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-23 21:26:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-23 21:26:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-09-23 21:26:36,014 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2018-09-23 21:26:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:36,014 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-09-23 21:26:36,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:26:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-09-23 21:26:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-23 21:26:36,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:36,016 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1] [2018-09-23 21:26:36,016 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:36,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:36,016 INFO L82 PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times [2018-09-23 21:26:36,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:36,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:36,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-09-23 21:26:39,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:39,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:39,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:39,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:39,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:39,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-09-23 21:26:39,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:39,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 21:26:39,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:26:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:26:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:26:39,357 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states. [2018-09-23 21:26:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:40,618 INFO L93 Difference]: Finished difference Result 531 states and 534 transitions. [2018-09-23 21:26:40,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:26:40,618 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-09-23 21:26:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:40,620 INFO L225 Difference]: With dead ends: 531 [2018-09-23 21:26:40,620 INFO L226 Difference]: Without dead ends: 355 [2018-09-23 21:26:40,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:26:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-09-23 21:26:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-09-23 21:26:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-23 21:26:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-09-23 21:26:40,625 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2018-09-23 21:26:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:40,626 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-09-23 21:26:40,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:26:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-09-23 21:26:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-23 21:26:40,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:40,627 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1] [2018-09-23 21:26:40,627 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:40,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times [2018-09-23 21:26:40,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:40,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:40,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-09-23 21:26:43,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:43,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:43,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:51,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-23 21:26:51,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:51,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-09-23 21:26:51,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:51,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:26:51,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:26:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:26:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:26:51,616 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states. [2018-09-23 21:26:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:52,549 INFO L93 Difference]: Finished difference Result 537 states and 540 transitions. [2018-09-23 21:26:52,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:26:52,549 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-09-23 21:26:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:52,551 INFO L225 Difference]: With dead ends: 537 [2018-09-23 21:26:52,552 INFO L226 Difference]: Without dead ends: 359 [2018-09-23 21:26:52,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:26:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-23 21:26:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-09-23 21:26:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-23 21:26:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2018-09-23 21:26:52,557 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354 [2018-09-23 21:26:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:52,557 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2018-09-23 21:26:52,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:26:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2018-09-23 21:26:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-23 21:26:52,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:52,559 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1, 1, 1] [2018-09-23 21:26:52,559 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:52,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash 956890027, now seen corresponding path program 88 times [2018-09-23 21:26:52,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:52,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:52,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:52,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:52,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-09-23 21:26:55,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:55,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:55,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:55,655 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:55,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:55,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-09-23 21:26:55,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:55,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 21:26:55,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:26:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:26:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:26:55,755 INFO L87 Difference]: Start difference. First operand 359 states and 360 transitions. Second operand 91 states. [2018-09-23 21:26:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:56,711 INFO L93 Difference]: Finished difference Result 543 states and 546 transitions. [2018-09-23 21:26:56,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:26:56,711 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-09-23 21:26:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:56,713 INFO L225 Difference]: With dead ends: 543 [2018-09-23 21:26:56,713 INFO L226 Difference]: Without dead ends: 363 [2018-09-23 21:26:56,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:26:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-23 21:26:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-09-23 21:26:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-09-23 21:26:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 364 transitions. [2018-09-23 21:26:56,720 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 364 transitions. Word has length 358 [2018-09-23 21:26:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:56,720 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 364 transitions. [2018-09-23 21:26:56,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:26:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 364 transitions. [2018-09-23 21:26:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-23 21:26:56,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:56,721 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 1, 1, 1, 1] [2018-09-23 21:26:56,721 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:56,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash 723294751, now seen corresponding path program 89 times [2018-09-23 21:26:56,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:56,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:56,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:56,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:56,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:26:58,579 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:26:58,584 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:26:58,584 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:26:58 BoogieIcfgContainer [2018-09-23 21:26:58,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:26:58,585 INFO L168 Benchmark]: Toolchain (without parser) took 248005.96 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 7.3 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 431.7 MB). Peak memory consumption was 439.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:58,587 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:26:58,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:26:58,587 INFO L168 Benchmark]: Boogie Preprocessor took 26.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:26:58,588 INFO L168 Benchmark]: RCFGBuilder took 268.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:58,588 INFO L168 Benchmark]: TraceAbstraction took 247655.01 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 7.3 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 410.6 MB). Peak memory consumption was 417.9 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:58,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 268.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247655.01 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 7.3 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 410.6 MB). Peak memory consumption was 417.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 56). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 90, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 63 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 247.5s OverallTime, 90 OverallIterations, 90 TraceHistogramMax, 38.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 534 SDtfs, 7253 SDslu, 10076 SDs, 0 SdLazy, 10254 SolverSat, 7507 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20198 GetRequests, 16193 SyntacticMatches, 0 SemanticMatches, 4005 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=363occurred in iteration=89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 89 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 84.5s SatisfiabilityAnalysisTime, 114.7s InterpolantComputationTime, 32390 NumberOfCodeBlocks, 32390 NumberOfCodeBlocksAsserted, 2128 NumberOfCheckSat, 32213 ConstructedInterpolants, 0 QuantifiedInterpolants, 15390013 SizeOfPredicates, 0 NumberOfNonLiveVariables, 48488 ConjunctsInSsa, 4092 ConjunctsInUnsatCore, 177 InterpolantComputations, 1 PerfectInterpolantSequences, 469920/939840 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-26-58-600.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-26-58-600.csv Completed graceful shutdown