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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:58:32,274 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:58:32,276 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:58:32,293 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:58:32,294 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:58:32,295 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:58:32,297 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:58:32,299 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:58:32,302 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:58:32,303 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:58:32,304 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:58:32,305 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:58:32,307 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:58:32,308 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:58:32,309 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:58:32,310 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:58:32,311 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:58:32,313 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:58:32,318 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:58:32,321 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:58:32,322 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:58:32,323 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:58:32,326 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:58:32,346 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:58:32,374 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:58:32,374 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:58:32,376 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:58:32,376 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:58:32,377 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:58:32,377 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:58:32,378 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:58:32,379 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:58:32,379 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:58:32,379 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:58:32,379 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:58:32,379 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:58:32,380 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:58:32,380 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:58:32,380 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:58:32,380 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:58:32,380 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:58:32,382 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:58:32,382 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:58:32,382 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:58:32,383 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:58:32,383 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:58:32,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:58:32,383 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:58:32,383 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:58:32,384 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:58:32,384 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:58:32,384 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:58:32,384 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:58:32,386 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:58:32,386 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:58:32,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:58:32,468 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:58:32,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:58:32,474 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:58:32,474 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:58:32,475 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl [2018-09-26 21:58:32,475 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl' [2018-09-26 21:58:32,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:58:32,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:58:32,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:58:32,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:58:32,537 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:58:32,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,578 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:58:32,578 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:58:32,579 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:58:32,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:58:32,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:58:32,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:58:32,582 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:58:32,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/1) ... [2018-09-26 21:58:32,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:58:32,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:58:32,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:58:32,610 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:58:32,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (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 [2018-09-26 21:58:32,696 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:58:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:58:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:58:32,835 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:58:32,835 INFO L202 PluginConnector]: Adding new model NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:58:32 BoogieIcfgContainer [2018-09-26 21:58:32,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:58:32,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:58:32,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:58:32,840 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:58:32,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:32" (1/2) ... [2018-09-26 21:58:32,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84e4294 and model type NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:58:32, skipping insertion in model container [2018-09-26 21:58:32,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:58:32" (2/2) ... [2018-09-26 21:58:32,844 INFO L112 eAbstractionObserver]: Analyzing ICFG NeonAngel01.bpl [2018-09-26 21:58:32,854 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:58:32,862 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:58:32,912 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:58:32,913 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:58:32,913 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:58:32,913 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:58:32,913 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:58:32,913 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:58:32,913 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:58:32,914 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:58:32,914 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:58:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:58:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:58:32,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:32,937 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:58:32,938 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:32,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-26 21:58:32,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:32,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:32,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:32,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:32,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,083 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:58:33,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:58:33,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:58:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:58:33,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,102 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:58:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:33,314 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-26 21:58:33,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:58:33,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:58:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:33,327 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:58:33,327 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:58:33,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:58:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:58:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:58:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:58:33,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:58:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:33,368 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:58:33,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:58:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:58:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:58:33,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:33,369 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:58:33,369 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:33,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-26 21:58:33,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:33,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:33,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:33,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:33,449 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 [2018-09-26 21:58:33,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:33,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:58:33,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:58:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:58:33,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,548 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-26 21:58:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:33,619 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:58:33,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:58:33,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 21:58:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:33,621 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:58:33,621 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:58:33,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:58:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:58:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:58:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:58:33,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:58:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:33,624 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:58:33,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:58:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:58:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:58:33,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:33,625 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 21:58:33,626 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:33,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:33,626 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-26 21:58:33,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:33,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:33,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:33,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:33,671 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 [2018-09-26 21:58:33,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:33,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:33,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:33,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:33,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:58:33,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:58:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:58:33,737 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,737 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-26 21:58:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:33,913 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:58:33,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:58:33,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-26 21:58:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:33,914 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:58:33,915 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:58:33,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:58:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:58:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:58:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:58:33,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:58:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:33,919 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:58:33,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:58:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:58:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:58:33,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:33,920 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-26 21:58:33,920 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:33,920 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-26 21:58:33,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:33,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:33,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:33,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:34,158 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 [2018-09-26 21:58:34,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:34,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:58:34,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:34,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:34,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:58:34,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:58:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:58:34,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:34,294 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-26 21:58:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:34,429 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:58:34,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:58:34,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-26 21:58:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:34,432 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:58:34,432 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:58:34,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:58:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:58:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:58:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:58:34,436 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:58:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:34,436 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:58:34,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:58:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:58:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:58:34,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:34,437 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-26 21:58:34,437 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:34,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-26 21:58:34,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:34,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:34,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:34,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:34,534 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 [2018-09-26 21:58:34,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:34,567 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:34,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:34,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:34,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:58:34,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:58:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:58:34,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:34,707 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-26 21:58:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:34,784 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:58:34,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:58:34,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-26 21:58:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:34,785 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:58:34,786 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:58:34,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:58:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:58:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:58:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:58:34,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:58:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:34,790 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:58:34,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:58:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:58:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:58:34,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:34,790 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-26 21:58:34,791 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:34,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-26 21:58:34,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:34,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:34,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:34,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:34,895 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 [2018-09-26 21:58:34,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:34,922 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:58:34,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:34,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:35,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:58:35,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:58:35,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:58:35,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:35,028 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-26 21:58:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:35,253 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:58:35,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:58:35,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-26 21:58:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:35,255 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:58:35,255 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:58:35,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:58:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:58:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:58:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:58:35,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:58:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:35,265 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:58:35,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:58:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:58:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:58:35,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:35,267 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-26 21:58:35,267 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:35,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-26 21:58:35,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:35,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:35,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:35,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:35,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:35,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:35,647 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:58:35,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:35,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:35,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:58:35,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:58:35,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:58:35,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:35,733 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-26 21:58:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:35,924 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:58:35,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:58:35,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-26 21:58:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:35,925 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:58:35,925 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:58:35,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:58:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:58:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:58:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:58:35,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:58:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:35,929 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:58:35,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:58:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:58:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:58:35,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:35,930 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-26 21:58:35,930 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:35,930 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:35,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-26 21:58:35,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:35,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:35,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:35,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:36,024 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 [2018-09-26 21:58:36,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:36,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:36,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:36,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:36,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:36,206 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-26 21:58:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:36,304 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:58:36,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:36,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-26 21:58:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:36,306 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:58:36,307 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:58:36,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:58:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:58:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:58:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:58:36,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:58:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:36,311 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:58:36,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:58:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:58:36,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:36,311 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-26 21:58:36,312 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:36,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:36,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-26 21:58:36,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:36,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:36,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:36,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:36,428 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 [2018-09-26 21:58:36,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:36,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:36,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:36,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:36,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:36,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:36,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:36,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:36,526 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-26 21:58:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:36,683 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:58:36,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:36,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-26 21:58:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:36,685 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:58:36,685 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:58:36,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:58:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:58:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:58:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:58:36,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:58:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:36,688 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:58:36,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:58:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:58:36,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:36,689 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-26 21:58:36,689 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:36,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-26 21:58:36,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:36,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:36,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:36,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:37,270 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 [2018-09-26 21:58:37,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:37,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:58:37,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:37,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:37,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:58:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:58:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:58:37,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:37,702 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-26 21:58:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:37,790 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:58:37,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:58:37,791 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-26 21:58:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:37,792 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:58:37,792 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:58:37,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:58:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:58:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:58:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:58:37,796 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:58:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:37,797 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:58:37,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:58:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:58:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:58:37,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:37,798 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-26 21:58:37,798 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:37,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-26 21:58:37,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:37,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:37,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:37,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:37,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:37,938 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 [2018-09-26 21:58:37,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:37,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:37,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:37,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:38,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:38,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:58:38,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:58:38,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:58:38,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:38,050 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-26 21:58:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:38,177 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:58:38,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:58:38,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-26 21:58:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:38,178 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:58:38,178 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:58:38,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:58:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:58:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:58:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:58:38,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:58:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:38,184 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:58:38,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:58:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:58:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:58:38,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:38,185 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-26 21:58:38,185 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:38,185 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:38,185 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-26 21:58:38,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:38,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:38,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:38,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:38,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:38,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:38,335 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 [2018-09-26 21:58:38,347 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:40,838 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:58:40,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:40,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:40,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:40,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:58:40,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:58:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:58:40,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:40,941 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-26 21:58:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:41,086 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:58:41,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:58:41,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:58:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:41,087 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:58:41,088 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:58:41,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:58:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:58:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:58:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:58:41,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:58:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:41,092 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:58:41,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:58:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:58:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:58:41,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:41,093 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-26 21:58:41,093 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:41,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-26 21:58:41,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:41,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:41,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:41,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:41,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:41,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:41,291 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:58:41,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:41,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:41,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:58:41,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:58:41,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:58:41,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:41,372 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-26 21:58:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:41,488 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:58:41,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:58:41,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-26 21:58:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:41,489 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:58:41,489 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:58:41,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:58:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:58:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:58:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:58:41,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:58:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:41,494 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:58:41,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:58:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:58:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:58:41,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:41,495 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-26 21:58:41,496 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:41,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:41,496 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-26 21:58:41,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:41,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:41,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:41,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:41,643 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 [2018-09-26 21:58:41,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:41,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:41,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:58:41,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:58:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:58:41,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:41,892 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-26 21:58:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:43,481 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:58:43,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:58:43,483 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-26 21:58:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:43,484 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:58:43,485 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:58:43,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:58:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:58:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:58:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:58:43,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:58:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:43,489 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:58:43,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:58:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:58:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:43,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:43,490 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-26 21:58:43,490 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:43,491 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-26 21:58:43,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:43,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:43,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:43,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:43,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:43,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:43,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:43,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:43,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:43,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:43,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:43,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:43,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:58:44,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:58:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:58:44,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:44,000 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-26 21:58:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:44,106 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:58:44,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:58:44,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-26 21:58:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:44,107 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:58:44,108 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:58:44,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:58:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:58:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:58:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:58:44,111 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:58:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:44,111 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:58:44,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:58:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:58:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:58:44,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:44,112 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-26 21:58:44,113 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:44,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-26 21:58:44,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:44,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:44,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:44,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:44,308 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 [2018-09-26 21:58:44,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:46,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:58:46,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:46,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:46,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:58:46,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:58:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:58:46,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:46,958 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-26 21:58:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:47,144 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:58:47,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:58:47,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-26 21:58:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:47,146 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:58:47,146 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:58:47,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:58:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:58:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:58:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:58:47,151 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:58:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:47,151 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:58:47,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:58:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:58:47,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:47,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:47,152 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-26 21:58:47,152 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:47,152 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:47,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-26 21:58:47,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:47,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:47,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:47,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:47,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:47,509 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 [2018-09-26 21:58:47,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:47,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:47,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:47,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:47,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:47,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:58:47,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:58:47,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:58:47,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:47,612 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-26 21:58:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:47,778 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:58:47,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:58:47,779 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-26 21:58:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:47,779 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:58:47,780 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:58:47,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:58:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:58:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:58:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:58:47,784 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:58:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:47,784 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:58:47,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:58:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:58:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:58:47,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:47,785 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-26 21:58:47,786 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:47,786 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-26 21:58:47,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:47,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:47,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:47,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:48,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:48,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:48,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:37,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:59:37,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:38,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:38,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:38,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:59:38,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:59:38,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:59:38,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:38,518 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-26 21:59:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:38,661 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:59:38,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:59:38,662 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-26 21:59:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:38,662 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:59:38,663 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:59:38,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:59:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:59:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:59:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:59:38,667 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:59:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:38,667 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:59:38,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:59:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:59:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:59:38,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:38,668 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-26 21:59:38,669 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:38,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-26 21:59:38,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:38,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:38,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:38,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:38,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:38,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:38,904 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 [2018-09-26 21:59:38,915 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:40,808 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:59:40,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:40,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:40,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:40,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:59:40,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:59:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:59:40,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:40,905 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-26 21:59:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:41,070 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:59:41,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:59:41,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-26 21:59:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:41,072 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:59:41,072 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:59:41,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:59:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:59:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:59:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:59:41,076 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:59:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:41,076 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:59:41,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:59:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:59:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:59:41,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:41,077 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-26 21:59:41,078 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:41,078 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-26 21:59:41,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:41,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:41,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:41,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:41,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:41,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:41,197 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 [2018-09-26 21:59:41,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:41,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:41,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:41,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:59:41,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:59:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:59:41,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:41,405 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-26 21:59:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:42,432 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:59:42,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:59:42,432 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-26 21:59:42,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:42,433 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:59:42,433 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:59:42,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:59:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:59:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:59:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:59:42,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:59:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:42,438 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:59:42,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:59:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:59:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:59:42,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:42,439 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-26 21:59:42,439 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:42,439 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:42,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-26 21:59:42,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:42,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:42,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:42,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:42,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:42,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:42,748 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 [2018-09-26 21:59:42,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:42,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:42,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:42,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:42,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:42,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:59:42,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:59:42,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:59:42,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:42,839 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-26 21:59:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:43,041 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:59:43,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:59:43,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-26 21:59:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:43,043 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:59:43,043 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:59:43,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:59:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:59:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:59:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:59:43,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:59:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:43,046 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:59:43,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:59:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:59:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:59:43,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:43,047 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-26 21:59:43,048 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:43,048 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-26 21:59:43,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:43,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:43,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:43,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:43,206 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 [2018-09-26 21:59:43,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:17,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 22:00:17,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:17,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:17,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:17,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 22:00:17,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 22:00:17,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 22:00:17,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:17,748 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-26 22:00:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:18,141 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 22:00:18,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 22:00:18,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-26 22:00:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:18,143 INFO L225 Difference]: With dead ends: 28 [2018-09-26 22:00:18,143 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 22:00:18,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 22:00:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 22:00:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 22:00:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 22:00:18,148 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 22:00:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:18,148 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 22:00:18,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 22:00:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 22:00:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 22:00:18,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:18,149 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-26 22:00:18,149 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:18,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-26 22:00:18,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:18,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:18,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:18,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:18,348 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 [2018-09-26 22:00:18,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:18,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:18,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:18,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:18,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:18,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 22:00:18,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 22:00:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 22:00:18,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:18,559 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-26 22:00:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:19,278 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 22:00:19,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 22:00:19,279 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-26 22:00:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:19,279 INFO L225 Difference]: With dead ends: 29 [2018-09-26 22:00:19,279 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 22:00:19,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 22:00:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 22:00:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 22:00:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 22:00:19,283 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 22:00:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:19,283 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 22:00:19,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 22:00:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 22:00:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 22:00:19,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:19,284 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-26 22:00:19,284 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:19,284 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-26 22:00:19,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:19,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:19,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:19,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:19,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:19,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:19,456 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 [2018-09-26 22:00:19,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:01:32,878 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 22:01:32,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:33,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:33,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:33,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 22:01:33,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 22:01:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 22:01:33,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:33,225 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-26 22:01:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:33,582 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 22:01:33,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 22:01:33,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-26 22:01:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:33,583 INFO L225 Difference]: With dead ends: 30 [2018-09-26 22:01:33,583 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 22:01:33,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 22:01:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 22:01:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 22:01:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 22:01:33,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 22:01:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:33,588 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 22:01:33,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 22:01:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 22:01:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 22:01:33,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:33,589 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-26 22:01:33,590 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:33,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:33,590 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-26 22:01:33,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:33,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:33,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:33,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:33,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:33,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:33,753 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 [2018-09-26 22:01:33,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:01:41,482 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 22:01:41,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:41,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:41,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:41,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 22:01:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 22:01:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 22:01:41,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:41,643 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-26 22:01:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:41,818 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 22:01:41,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 22:01:41,818 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-26 22:01:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:41,819 INFO L225 Difference]: With dead ends: 31 [2018-09-26 22:01:41,819 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 22:01:41,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 22:01:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 22:01:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 22:01:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 22:01:41,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 22:01:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:41,823 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 22:01:41,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 22:01:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 22:01:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 22:01:41,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:41,824 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-26 22:01:41,824 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:41,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-26 22:01:41,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:41,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:41,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:41,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:41,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:41,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:41,971 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 [2018-09-26 22:01:41,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:42,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:42,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:42,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 22:01:42,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 22:01:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 22:01:42,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:42,097 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-26 22:01:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:42,271 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 22:01:42,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 22:01:42,271 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-26 22:01:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:42,272 INFO L225 Difference]: With dead ends: 32 [2018-09-26 22:01:42,272 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 22:01:42,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 22:01:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 22:01:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 22:01:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 22:01:42,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 22:01:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:42,276 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 22:01:42,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 22:01:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 22:01:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 22:01:42,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:42,277 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-26 22:01:42,277 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:42,277 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-26 22:01:42,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:42,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:42,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:42,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:42,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:43,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:43,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 22:01:43,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:01:43,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:01:43,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:43,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:43,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:43,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 22:01:43,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 22:01:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 22:01:43,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:43,884 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-26 22:01:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:44,101 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 22:01:44,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 22:01:44,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-26 22:01:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:44,102 INFO L225 Difference]: With dead ends: 33 [2018-09-26 22:01:44,102 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 22:01:44,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 22:01:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 22:01:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 22:01:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 22:01:44,105 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 22:01:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:44,105 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 22:01:44,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 22:01:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 22:01:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 22:01:44,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:44,106 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-26 22:01:44,106 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:44,107 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-26 22:01:44,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:44,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:44,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:44,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:44,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:44,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:44,558 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 [2018-09-26 22:01:44,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:02:37,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 22:02:37,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:02:37,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:02:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:37,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:02:37,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 22:02:37,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 22:02:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 22:02:37,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:02:37,854 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-26 22:02:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:02:38,005 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 22:02:38,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 22:02:38,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-26 22:02:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:02:38,006 INFO L225 Difference]: With dead ends: 34 [2018-09-26 22:02:38,006 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 22:02:38,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:02:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 22:02:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 22:02:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:02:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 22:02:38,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 22:02:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:02:38,011 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 22:02:38,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 22:02:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 22:02:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 22:02:38,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:02:38,012 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-26 22:02:38,012 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:02:38,012 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:02:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-26 22:02:38,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:02:38,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:02:38,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:38,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:02:38,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:02:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:38,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:02:38,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 22:02:38,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:02:38,855 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:02:38,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:02:38,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:02:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:38,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:02:38,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 22:02:38,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 22:02:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 22:02:38,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:02:38,961 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-26 22:02:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:02:39,173 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 22:02:39,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 22:02:39,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-26 22:02:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:02:39,174 INFO L225 Difference]: With dead ends: 35 [2018-09-26 22:02:39,175 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 22:02:39,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:02:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 22:02:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 22:02:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 22:02:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 22:02:39,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 22:02:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:02:39,180 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 22:02:39,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 22:02:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 22:02:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 22:02:39,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:02:39,181 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-26 22:02:39,182 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:02:39,182 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:02:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-26 22:02:39,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:02:39,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:02:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:39,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:02:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:02:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:39,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:02:39,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 22:02:39,913 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown