java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:12:33,222 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:12:33,225 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:12:33,236 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:12:33,237 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:12:33,238 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:12:33,239 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:12:33,241 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:12:33,243 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:12:33,244 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:12:33,244 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:12:33,245 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:12:33,246 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:12:33,247 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:12:33,248 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:12:33,249 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:12:33,250 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:12:33,251 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:12:33,253 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:12:33,255 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:12:33,257 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:12:33,259 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:12:33,263 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:12:33,282 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:12:33,302 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:12:33,302 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:12:33,303 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:12:33,303 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:12:33,304 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:12:33,304 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:12:33,304 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:12:33,304 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:12:33,305 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:12:33,305 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:12:33,305 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:12:33,305 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:12:33,305 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:12:33,306 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:12:33,306 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:12:33,306 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:12:33,306 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:12:33,306 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:12:33,307 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:12:33,307 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:12:33,307 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:12:33,307 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:12:33,307 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:12:33,308 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:12:33,308 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:12:33,308 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:12:33,308 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:12:33,308 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:12:33,309 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:12:33,309 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:12:33,353 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:12:33,366 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:12:33,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:12:33,371 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:12:33,372 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:12:33,373 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl [2018-09-26 21:12:33,373 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl' [2018-09-26 21:12:33,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:12:33,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:12:33,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:12:33,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:12:33,432 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:12:33,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,470 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:12:33,470 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:12:33,470 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:12:33,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:12:33,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:12:33,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:12:33,474 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:12:33,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/1) ... [2018-09-26 21:12:33,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:12:33,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:12:33,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:12:33,502 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:12:33,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (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 21:12:33,582 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-26 21:12:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-26 21:12:33,583 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-26 21:12:34,126 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:12:34,126 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:12:34 BoogieIcfgContainer [2018-09-26 21:12:34,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:12:34,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:12:34,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:12:34,131 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:12:34,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:33" (1/2) ... [2018-09-26 21:12:34,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dacd0dd and model type threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:12:34, skipping insertion in model container [2018-09-26 21:12:34,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:12:34" (2/2) ... [2018-09-26 21:12:34,135 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product.bpl [2018-09-26 21:12:34,145 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:12:34,154 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-26 21:12:34,204 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:12:34,205 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:12:34,205 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:12:34,205 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:12:34,205 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:12:34,206 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:12:34,206 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:12:34,206 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:12:34,206 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:12:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-26 21:12:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:12:34,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:34,230 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:12:34,231 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:34,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash 28755683, now seen corresponding path program 1 times [2018-09-26 21:12:34,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:34,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:34,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:34,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:34,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:34,442 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 21:12:34,445 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:34,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:12:34,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:12:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:12:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:12:34,466 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-09-26 21:12:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:35,151 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2018-09-26 21:12:35,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:12:35,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-26 21:12:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:35,168 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:12:35,169 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:12:35,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:12:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:12:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-26 21:12:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:12:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2018-09-26 21:12:35,213 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 5 [2018-09-26 21:12:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:35,214 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2018-09-26 21:12:35,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:12:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2018-09-26 21:12:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:12:35,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:35,215 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:12:35,216 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:35,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:35,216 INFO L82 PathProgramCache]: Analyzing trace with hash 28971747, now seen corresponding path program 1 times [2018-09-26 21:12:35,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:35,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:35,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:35,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:35,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:35,281 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 21:12:35,281 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:35,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:12:35,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:12:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:12:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:12:35,284 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 5 states. [2018-09-26 21:12:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:35,649 INFO L93 Difference]: Finished difference Result 57 states and 99 transitions. [2018-09-26 21:12:35,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:12:35,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-26 21:12:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:35,651 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:12:35,651 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:12:35,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:12:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:12:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-09-26 21:12:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:12:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 63 transitions. [2018-09-26 21:12:35,662 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 63 transitions. Word has length 5 [2018-09-26 21:12:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:35,664 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 63 transitions. [2018-09-26 21:12:35,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:12:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 63 transitions. [2018-09-26 21:12:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:12:35,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:35,669 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:35,669 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:35,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1864688358, now seen corresponding path program 1 times [2018-09-26 21:12:35,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:35,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:35,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:35,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:35,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:35,901 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 21:12:35,902 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:35,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-26 21:12:35,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:12:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:12:35,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:12:35,906 INFO L87 Difference]: Start difference. First operand 38 states and 63 transitions. Second operand 7 states. [2018-09-26 21:12:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:37,032 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2018-09-26 21:12:37,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:12:37,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-26 21:12:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:37,034 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:12:37,034 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:12:37,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:12:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:12:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2018-09-26 21:12:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:12:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 86 transitions. [2018-09-26 21:12:37,047 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 86 transitions. Word has length 7 [2018-09-26 21:12:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:37,048 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 86 transitions. [2018-09-26 21:12:37,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:12:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 86 transitions. [2018-09-26 21:12:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:12:37,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:37,049 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:12:37,050 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:37,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1865765160, now seen corresponding path program 1 times [2018-09-26 21:12:37,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:37,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:37,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:37,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:37,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:37,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:37,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:37,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:37,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:37,605 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:12:37,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-26 21:12:37,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:12:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:12:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:12:37,607 INFO L87 Difference]: Start difference. First operand 51 states and 86 transitions. Second operand 9 states. [2018-09-26 21:12:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:38,421 INFO L93 Difference]: Finished difference Result 142 states and 245 transitions. [2018-09-26 21:12:38,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:12:38,422 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-09-26 21:12:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:38,424 INFO L225 Difference]: With dead ends: 142 [2018-09-26 21:12:38,424 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:12:38,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:12:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:12:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2018-09-26 21:12:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:12:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 120 transitions. [2018-09-26 21:12:38,440 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 120 transitions. Word has length 7 [2018-09-26 21:12:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:38,441 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 120 transitions. [2018-09-26 21:12:38,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:12:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 120 transitions. [2018-09-26 21:12:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:12:38,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:38,442 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:38,443 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:38,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash 964893579, now seen corresponding path program 1 times [2018-09-26 21:12:38,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:38,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:38,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:38,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:38,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:38,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:38,573 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 21:12:38,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:38,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:38,666 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:12:38,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2018-09-26 21:12:38,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:12:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:12:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:12:38,668 INFO L87 Difference]: Start difference. First operand 73 states and 120 transitions. Second operand 11 states. [2018-09-26 21:12:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:39,435 INFO L93 Difference]: Finished difference Result 148 states and 240 transitions. [2018-09-26 21:12:39,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:12:39,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-09-26 21:12:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:39,438 INFO L225 Difference]: With dead ends: 148 [2018-09-26 21:12:39,438 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:12:39,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:12:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:12:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2018-09-26 21:12:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:12:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 119 transitions. [2018-09-26 21:12:39,454 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 119 transitions. Word has length 9 [2018-09-26 21:12:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:39,454 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 119 transitions. [2018-09-26 21:12:39,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:12:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 119 transitions. [2018-09-26 21:12:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:39,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:39,456 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:39,456 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:39,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash 101966393, now seen corresponding path program 1 times [2018-09-26 21:12:39,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:39,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:39,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:39,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:39,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:39,668 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 21:12:39,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:39,668 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 21:12:39,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:39,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:39,783 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 21:12:39,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:39,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:12:39,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:12:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:12:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:12:39,805 INFO L87 Difference]: Start difference. First operand 78 states and 119 transitions. Second operand 14 states. [2018-09-26 21:12:40,065 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-26 21:12:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:40,701 INFO L93 Difference]: Finished difference Result 124 states and 193 transitions. [2018-09-26 21:12:40,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:12:40,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:12:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:40,702 INFO L225 Difference]: With dead ends: 124 [2018-09-26 21:12:40,702 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:12:40,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:12:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:12:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2018-09-26 21:12:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:12:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 173 transitions. [2018-09-26 21:12:40,724 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 173 transitions. Word has length 10 [2018-09-26 21:12:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:40,724 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 173 transitions. [2018-09-26 21:12:40,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:12:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 173 transitions. [2018-09-26 21:12:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:40,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:40,726 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:40,726 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:40,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:40,728 INFO L82 PathProgramCache]: Analyzing trace with hash 103259259, now seen corresponding path program 1 times [2018-09-26 21:12:40,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:40,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:40,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:40,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:40,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:40,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:40,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-26 21:12:40,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:12:40,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:12:40,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:12:40,884 INFO L87 Difference]: Start difference. First operand 107 states and 173 transitions. Second operand 8 states. [2018-09-26 21:12:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:41,586 INFO L93 Difference]: Finished difference Result 132 states and 203 transitions. [2018-09-26 21:12:41,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:12:41,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-26 21:12:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:41,587 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:12:41,588 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:12:41,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:12:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:12:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2018-09-26 21:12:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:12:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 196 transitions. [2018-09-26 21:12:41,607 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 196 transitions. Word has length 10 [2018-09-26 21:12:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:41,608 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-09-26 21:12:41,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:12:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 196 transitions. [2018-09-26 21:12:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:41,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:41,609 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:41,610 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:41,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash -176034144, now seen corresponding path program 1 times [2018-09-26 21:12:41,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:41,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:41,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:41,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:41,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:41,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:41,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:41,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:41,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:42,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:42,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-26 21:12:42,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:12:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:12:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:12:42,551 INFO L87 Difference]: Start difference. First operand 121 states and 196 transitions. Second operand 14 states. [2018-09-26 21:12:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:43,964 INFO L93 Difference]: Finished difference Result 162 states and 262 transitions. [2018-09-26 21:12:43,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:12:43,964 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:12:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:43,965 INFO L225 Difference]: With dead ends: 162 [2018-09-26 21:12:43,966 INFO L226 Difference]: Without dead ends: 160 [2018-09-26 21:12:43,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:12:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-26 21:12:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2018-09-26 21:12:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:12:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 209 transitions. [2018-09-26 21:12:44,005 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 209 transitions. Word has length 10 [2018-09-26 21:12:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:44,005 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 209 transitions. [2018-09-26 21:12:44,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:12:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 209 transitions. [2018-09-26 21:12:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:44,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:44,009 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:44,011 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:44,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash -176034432, now seen corresponding path program 1 times [2018-09-26 21:12:44,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:44,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:44,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:44,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:44,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:44,454 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 21:12:44,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:44,455 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 21:12:44,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:44,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:44,627 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 21:12:44,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:44,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-26 21:12:44,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:12:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:12:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:12:44,649 INFO L87 Difference]: Start difference. First operand 129 states and 209 transitions. Second operand 13 states. [2018-09-26 21:12:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:45,933 INFO L93 Difference]: Finished difference Result 223 states and 343 transitions. [2018-09-26 21:12:45,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:12:45,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-26 21:12:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:45,935 INFO L225 Difference]: With dead ends: 223 [2018-09-26 21:12:45,935 INFO L226 Difference]: Without dead ends: 221 [2018-09-26 21:12:45,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:12:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-26 21:12:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2018-09-26 21:12:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:12:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 274 transitions. [2018-09-26 21:12:45,967 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 274 transitions. Word has length 10 [2018-09-26 21:12:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:45,967 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 274 transitions. [2018-09-26 21:12:45,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:12:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 274 transitions. [2018-09-26 21:12:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:45,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:45,969 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:45,969 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:45,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash -184622601, now seen corresponding path program 1 times [2018-09-26 21:12:45,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:45,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:45,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:45,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:45,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:46,142 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 21:12:46,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:46,143 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 21:12:46,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:46,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:46,275 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 21:12:46,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:46,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:12:46,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:12:46,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:12:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:12:46,305 INFO L87 Difference]: Start difference. First operand 167 states and 274 transitions. Second operand 14 states. [2018-09-26 21:12:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:47,770 INFO L93 Difference]: Finished difference Result 222 states and 351 transitions. [2018-09-26 21:12:47,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:12:47,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:12:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:47,773 INFO L225 Difference]: With dead ends: 222 [2018-09-26 21:12:47,773 INFO L226 Difference]: Without dead ends: 221 [2018-09-26 21:12:47,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:12:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-26 21:12:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 181. [2018-09-26 21:12:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:12:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2018-09-26 21:12:47,801 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 10 [2018-09-26 21:12:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:47,801 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2018-09-26 21:12:47,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:12:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2018-09-26 21:12:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:47,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:47,803 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:47,803 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:47,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash -184621319, now seen corresponding path program 1 times [2018-09-26 21:12:47,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:47,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:47,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:47,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:47,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:47,918 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 21:12:47,918 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:47,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-26 21:12:47,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:12:47,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:12:47,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:12:47,919 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand 8 states. [2018-09-26 21:12:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:48,242 INFO L93 Difference]: Finished difference Result 203 states and 320 transitions. [2018-09-26 21:12:48,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:12:48,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-26 21:12:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:48,245 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:12:48,245 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:12:48,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:12:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:12:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2018-09-26 21:12:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:12:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 301 transitions. [2018-09-26 21:12:48,278 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 301 transitions. Word has length 10 [2018-09-26 21:12:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:48,279 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 301 transitions. [2018-09-26 21:12:48,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:12:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 301 transitions. [2018-09-26 21:12:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:48,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:48,280 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:48,280 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:48,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -973282432, now seen corresponding path program 1 times [2018-09-26 21:12:48,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:48,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:48,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:48,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:48,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:48,516 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 21:12:48,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:48,517 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 21:12:48,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:48,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:48,609 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 21:12:48,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:48,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:12:48,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:12:48,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:12:48,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:12:48,631 INFO L87 Difference]: Start difference. First operand 183 states and 301 transitions. Second operand 14 states. [2018-09-26 21:12:49,314 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-09-26 21:12:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:49,748 INFO L93 Difference]: Finished difference Result 241 states and 385 transitions. [2018-09-26 21:12:49,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:12:49,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:12:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:49,751 INFO L225 Difference]: With dead ends: 241 [2018-09-26 21:12:49,751 INFO L226 Difference]: Without dead ends: 240 [2018-09-26 21:12:49,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:12:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-09-26 21:12:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-09-26 21:12:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-26 21:12:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 336 transitions. [2018-09-26 21:12:49,778 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 336 transitions. Word has length 10 [2018-09-26 21:12:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:49,778 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 336 transitions. [2018-09-26 21:12:49,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:12:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 336 transitions. [2018-09-26 21:12:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:49,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:49,779 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:49,779 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:49,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash -973281662, now seen corresponding path program 1 times [2018-09-26 21:12:49,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:49,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:49,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:49,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:49,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:49,903 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 21:12:49,904 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:49,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-26 21:12:49,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:12:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:12:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:12:49,906 INFO L87 Difference]: Start difference. First operand 202 states and 336 transitions. Second operand 8 states. [2018-09-26 21:12:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:50,237 INFO L93 Difference]: Finished difference Result 220 states and 353 transitions. [2018-09-26 21:12:50,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:12:50,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-26 21:12:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:50,239 INFO L225 Difference]: With dead ends: 220 [2018-09-26 21:12:50,239 INFO L226 Difference]: Without dead ends: 218 [2018-09-26 21:12:50,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:12:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-26 21:12:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2018-09-26 21:12:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-26 21:12:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 348 transitions. [2018-09-26 21:12:50,266 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 348 transitions. Word has length 10 [2018-09-26 21:12:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:50,267 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 348 transitions. [2018-09-26 21:12:50,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:12:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 348 transitions. [2018-09-26 21:12:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:50,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:50,268 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:50,268 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:50,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash -981870601, now seen corresponding path program 1 times [2018-09-26 21:12:50,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:50,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:50,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:50,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:50,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:50,351 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 21:12:50,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:50,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:50,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:50,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:50,452 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 21:12:50,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:50,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-26 21:12:50,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:12:50,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:12:50,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:12:50,475 INFO L87 Difference]: Start difference. First operand 210 states and 348 transitions. Second operand 13 states. [2018-09-26 21:12:51,664 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-26 21:12:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:52,178 INFO L93 Difference]: Finished difference Result 320 states and 507 transitions. [2018-09-26 21:12:52,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:12:52,178 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-26 21:12:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:52,180 INFO L225 Difference]: With dead ends: 320 [2018-09-26 21:12:52,180 INFO L226 Difference]: Without dead ends: 318 [2018-09-26 21:12:52,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:12:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-26 21:12:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2018-09-26 21:12:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-26 21:12:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 430 transitions. [2018-09-26 21:12:52,212 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 430 transitions. Word has length 10 [2018-09-26 21:12:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:52,213 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 430 transitions. [2018-09-26 21:12:52,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:12:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 430 transitions. [2018-09-26 21:12:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:52,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:52,213 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:52,214 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:52,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash -981870889, now seen corresponding path program 1 times [2018-09-26 21:12:52,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:52,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:52,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:52,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:52,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:52,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:52,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:52,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:52,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:52,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:52,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-26 21:12:52,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:12:52,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:12:52,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:12:52,433 INFO L87 Difference]: Start difference. First operand 259 states and 430 transitions. Second operand 14 states. [2018-09-26 21:12:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:52,999 INFO L93 Difference]: Finished difference Result 304 states and 503 transitions. [2018-09-26 21:12:52,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:12:52,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:12:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:53,001 INFO L225 Difference]: With dead ends: 304 [2018-09-26 21:12:53,001 INFO L226 Difference]: Without dead ends: 302 [2018-09-26 21:12:53,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:12:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-09-26 21:12:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 270. [2018-09-26 21:12:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-26 21:12:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 448 transitions. [2018-09-26 21:12:53,040 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 448 transitions. Word has length 10 [2018-09-26 21:12:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:53,041 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 448 transitions. [2018-09-26 21:12:53,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:12:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 448 transitions. [2018-09-26 21:12:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:53,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:53,042 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:53,042 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:53,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1101306322, now seen corresponding path program 1 times [2018-09-26 21:12:53,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:53,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:53,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:53,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:53,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:53,256 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-09-26 21:12:53,297 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 21:12:53,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:53,297 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 21:12:53,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:53,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:53,377 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 21:12:53,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:53,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:12:53,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:12:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:12:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:12:53,399 INFO L87 Difference]: Start difference. First operand 270 states and 448 transitions. Second operand 14 states. [2018-09-26 21:12:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:53,872 INFO L93 Difference]: Finished difference Result 281 states and 455 transitions. [2018-09-26 21:12:53,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:12:53,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:12:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:53,874 INFO L225 Difference]: With dead ends: 281 [2018-09-26 21:12:53,874 INFO L226 Difference]: Without dead ends: 280 [2018-09-26 21:12:53,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:12:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-26 21:12:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2018-09-26 21:12:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-26 21:12:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 447 transitions. [2018-09-26 21:12:53,909 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 447 transitions. Word has length 10 [2018-09-26 21:12:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:53,909 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 447 transitions. [2018-09-26 21:12:53,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:12:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 447 transitions. [2018-09-26 21:12:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:12:53,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:53,910 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:53,910 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:53,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1102106644, now seen corresponding path program 1 times [2018-09-26 21:12:53,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:53,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:53,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:53,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:53,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:54,020 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:54,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-26 21:12:54,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:12:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:12:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:12:54,021 INFO L87 Difference]: Start difference. First operand 270 states and 447 transitions. Second operand 8 states. [2018-09-26 21:12:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:54,411 INFO L93 Difference]: Finished difference Result 286 states and 460 transitions. [2018-09-26 21:12:54,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:12:54,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-26 21:12:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:54,413 INFO L225 Difference]: With dead ends: 286 [2018-09-26 21:12:54,414 INFO L226 Difference]: Without dead ends: 284 [2018-09-26 21:12:54,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:12:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-26 21:12:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2018-09-26 21:12:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-26 21:12:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 443 transitions. [2018-09-26 21:12:54,458 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 443 transitions. Word has length 10 [2018-09-26 21:12:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:54,458 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 443 transitions. [2018-09-26 21:12:54,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:12:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 443 transitions. [2018-09-26 21:12:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:12:54,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:54,459 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:54,460 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:54,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 240543358, now seen corresponding path program 1 times [2018-09-26 21:12:54,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:54,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:54,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:54,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:54,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:55,341 WARN L178 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-26 21:12:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:55,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:55,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:55,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:55,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:55,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:55,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-26 21:12:55,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:12:55,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:12:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:12:55,813 INFO L87 Difference]: Start difference. First operand 268 states and 443 transitions. Second operand 16 states. [2018-09-26 21:12:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:58,018 INFO L93 Difference]: Finished difference Result 515 states and 842 transitions. [2018-09-26 21:12:58,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:12:58,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-26 21:12:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:58,021 INFO L225 Difference]: With dead ends: 515 [2018-09-26 21:12:58,021 INFO L226 Difference]: Without dead ends: 513 [2018-09-26 21:12:58,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:12:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-09-26 21:12:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 338. [2018-09-26 21:12:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-09-26 21:12:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2018-09-26 21:12:58,070 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 12 [2018-09-26 21:12:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:58,070 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2018-09-26 21:12:58,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:12:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2018-09-26 21:12:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:12:58,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:58,071 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:58,071 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:58,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1525011273, now seen corresponding path program 1 times [2018-09-26 21:12:58,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:58,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:58,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:58,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:58,374 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 21:12:58,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:58,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:58,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:58,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-26 21:12:58,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:12:58,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:12:58,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:12:58,503 INFO L87 Difference]: Start difference. First operand 338 states and 568 transitions. Second operand 16 states. [2018-09-26 21:12:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:59,964 INFO L93 Difference]: Finished difference Result 631 states and 1050 transitions. [2018-09-26 21:12:59,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:12:59,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-26 21:12:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:59,968 INFO L225 Difference]: With dead ends: 631 [2018-09-26 21:12:59,968 INFO L226 Difference]: Without dead ends: 629 [2018-09-26 21:12:59,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:12:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-26 21:13:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-09-26 21:13:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-26 21:13:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 685 transitions. [2018-09-26 21:13:00,049 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 685 transitions. Word has length 12 [2018-09-26 21:13:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:00,050 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 685 transitions. [2018-09-26 21:13:00,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:13:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 685 transitions. [2018-09-26 21:13:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:00,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:00,051 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:00,051 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:00,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1000080215, now seen corresponding path program 1 times [2018-09-26 21:13:00,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:00,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:00,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:00,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:00,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:00,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:00,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:00,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:00,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:00,279 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:13:00,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-26 21:13:00,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:00,280 INFO L87 Difference]: Start difference. First operand 403 states and 685 transitions. Second operand 14 states. [2018-09-26 21:13:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:02,399 INFO L93 Difference]: Finished difference Result 1330 states and 2225 transitions. [2018-09-26 21:13:02,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:13:02,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:13:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:02,404 INFO L225 Difference]: With dead ends: 1330 [2018-09-26 21:13:02,404 INFO L226 Difference]: Without dead ends: 929 [2018-09-26 21:13:02,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:13:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2018-09-26 21:13:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 694. [2018-09-26 21:13:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2018-09-26 21:13:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1171 transitions. [2018-09-26 21:13:02,563 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1171 transitions. Word has length 13 [2018-09-26 21:13:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:02,564 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1171 transitions. [2018-09-26 21:13:02,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1171 transitions. [2018-09-26 21:13:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:02,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:02,565 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:02,565 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:02,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash -86603521, now seen corresponding path program 1 times [2018-09-26 21:13:02,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:02,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:02,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:02,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:02,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:02,817 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 21:13:02,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:02,818 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 21:13:02,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:02,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:02,963 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 21:13:02,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:02,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-26 21:13:02,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:02,985 INFO L87 Difference]: Start difference. First operand 694 states and 1171 transitions. Second operand 14 states. [2018-09-26 21:13:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:04,148 INFO L93 Difference]: Finished difference Result 1557 states and 2604 transitions. [2018-09-26 21:13:04,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:13:04,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:13:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:04,156 INFO L225 Difference]: With dead ends: 1557 [2018-09-26 21:13:04,157 INFO L226 Difference]: Without dead ends: 864 [2018-09-26 21:13:04,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:13:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-09-26 21:13:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 741. [2018-09-26 21:13:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2018-09-26 21:13:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1247 transitions. [2018-09-26 21:13:04,309 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1247 transitions. Word has length 13 [2018-09-26 21:13:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:04,310 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 1247 transitions. [2018-09-26 21:13:04,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1247 transitions. [2018-09-26 21:13:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:04,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:04,311 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:04,311 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:04,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash -63701769, now seen corresponding path program 1 times [2018-09-26 21:13:04,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:04,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:04,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:04,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:04,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:04,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:04,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:04,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:04,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:04,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:04,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-26 21:13:04,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:13:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:13:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:13:04,635 INFO L87 Difference]: Start difference. First operand 741 states and 1247 transitions. Second operand 13 states. [2018-09-26 21:13:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:05,605 INFO L93 Difference]: Finished difference Result 1655 states and 2757 transitions. [2018-09-26 21:13:05,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:13:05,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-26 21:13:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:05,612 INFO L225 Difference]: With dead ends: 1655 [2018-09-26 21:13:05,612 INFO L226 Difference]: Without dead ends: 915 [2018-09-26 21:13:05,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:13:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-26 21:13:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 809. [2018-09-26 21:13:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-09-26 21:13:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1353 transitions. [2018-09-26 21:13:05,735 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1353 transitions. Word has length 13 [2018-09-26 21:13:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:05,735 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 1353 transitions. [2018-09-26 21:13:05,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:13:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1353 transitions. [2018-09-26 21:13:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:05,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:05,736 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:05,736 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:05,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1761298639, now seen corresponding path program 1 times [2018-09-26 21:13:05,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:05,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:05,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:05,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:05,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:05,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:05,829 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 21:13:05,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:05,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:05,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:05,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-26 21:13:05,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:13:05,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:13:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:13:05,914 INFO L87 Difference]: Start difference. First operand 809 states and 1353 transitions. Second operand 10 states. [2018-09-26 21:13:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:06,704 INFO L93 Difference]: Finished difference Result 939 states and 1541 transitions. [2018-09-26 21:13:06,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:13:06,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-26 21:13:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:06,707 INFO L225 Difference]: With dead ends: 939 [2018-09-26 21:13:06,708 INFO L226 Difference]: Without dead ends: 937 [2018-09-26 21:13:06,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:13:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2018-09-26 21:13:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2018-09-26 21:13:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-26 21:13:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1367 transitions. [2018-09-26 21:13:06,860 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1367 transitions. Word has length 13 [2018-09-26 21:13:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:06,860 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 1367 transitions. [2018-09-26 21:13:06,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:13:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1367 transitions. [2018-09-26 21:13:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:06,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:06,861 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:06,861 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:06,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471129, now seen corresponding path program 1 times [2018-09-26 21:13:06,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:06,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:06,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:06,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:06,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:06,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:06,981 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 21:13:06,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:07,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:07,371 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:13:07,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-26 21:13:07,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:07,372 INFO L87 Difference]: Start difference. First operand 820 states and 1367 transitions. Second operand 14 states. [2018-09-26 21:13:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:09,199 INFO L93 Difference]: Finished difference Result 2058 states and 3403 transitions. [2018-09-26 21:13:09,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:13:09,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:13:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:09,205 INFO L225 Difference]: With dead ends: 2058 [2018-09-26 21:13:09,205 INFO L226 Difference]: Without dead ends: 1239 [2018-09-26 21:13:09,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:13:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-09-26 21:13:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 899. [2018-09-26 21:13:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-09-26 21:13:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1500 transitions. [2018-09-26 21:13:09,438 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1500 transitions. Word has length 13 [2018-09-26 21:13:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:09,438 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 1500 transitions. [2018-09-26 21:13:09,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1500 transitions. [2018-09-26 21:13:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:09,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:09,440 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:09,440 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:09,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash 267374077, now seen corresponding path program 1 times [2018-09-26 21:13:09,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:09,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:09,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:09,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:09,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:09,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:09,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:09,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:09,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:10,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:10,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-26 21:13:10,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:13:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:13:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:13:10,501 INFO L87 Difference]: Start difference. First operand 899 states and 1500 transitions. Second operand 10 states. [2018-09-26 21:13:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:11,510 INFO L93 Difference]: Finished difference Result 1038 states and 1712 transitions. [2018-09-26 21:13:11,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:13:11,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-26 21:13:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:11,515 INFO L225 Difference]: With dead ends: 1038 [2018-09-26 21:13:11,515 INFO L226 Difference]: Without dead ends: 1036 [2018-09-26 21:13:11,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:13:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2018-09-26 21:13:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 897. [2018-09-26 21:13:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2018-09-26 21:13:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1498 transitions. [2018-09-26 21:13:11,699 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1498 transitions. Word has length 13 [2018-09-26 21:13:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:11,699 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1498 transitions. [2018-09-26 21:13:11,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:13:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1498 transitions. [2018-09-26 21:13:11,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:11,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:11,700 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:11,700 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:11,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash 290277111, now seen corresponding path program 1 times [2018-09-26 21:13:11,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:11,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:11,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:11,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:11,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:11,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:11,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:11,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:11,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:12,137 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:13:12,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-26 21:13:12,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:12,139 INFO L87 Difference]: Start difference. First operand 897 states and 1498 transitions. Second operand 14 states. [2018-09-26 21:13:12,423 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-26 21:13:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:14,435 INFO L93 Difference]: Finished difference Result 2193 states and 3616 transitions. [2018-09-26 21:13:14,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:13:14,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:13:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:14,440 INFO L225 Difference]: With dead ends: 2193 [2018-09-26 21:13:14,440 INFO L226 Difference]: Without dead ends: 1286 [2018-09-26 21:13:14,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:13:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2018-09-26 21:13:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 995. [2018-09-26 21:13:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-26 21:13:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1646 transitions. [2018-09-26 21:13:14,623 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1646 transitions. Word has length 13 [2018-09-26 21:13:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:14,623 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1646 transitions. [2018-09-26 21:13:14,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1646 transitions. [2018-09-26 21:13:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:14,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:14,624 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:14,625 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:14,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2115278289, now seen corresponding path program 1 times [2018-09-26 21:13:14,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:14,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:14,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:14,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:14,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:14,694 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 21:13:14,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:14,694 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 21:13:14,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:14,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:14,817 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 21:13:14,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:14,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-26 21:13:14,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:14,840 INFO L87 Difference]: Start difference. First operand 995 states and 1646 transitions. Second operand 14 states. [2018-09-26 21:13:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:16,015 INFO L93 Difference]: Finished difference Result 2165 states and 3551 transitions. [2018-09-26 21:13:16,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:13:16,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:13:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:16,019 INFO L225 Difference]: With dead ends: 2165 [2018-09-26 21:13:16,020 INFO L226 Difference]: Without dead ends: 1153 [2018-09-26 21:13:16,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:13:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2018-09-26 21:13:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1001. [2018-09-26 21:13:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2018-09-26 21:13:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1642 transitions. [2018-09-26 21:13:16,192 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1642 transitions. Word has length 13 [2018-09-26 21:13:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:16,192 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 1642 transitions. [2018-09-26 21:13:16,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1642 transitions. [2018-09-26 21:13:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:16,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:16,193 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:16,194 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:16,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2141517287, now seen corresponding path program 1 times [2018-09-26 21:13:16,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:16,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:16,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:16,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:16,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:16,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:16,254 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 21:13:16,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:16,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:16,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:16,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-26 21:13:16,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:13:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:13:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:13:16,400 INFO L87 Difference]: Start difference. First operand 1001 states and 1642 transitions. Second operand 13 states. [2018-09-26 21:13:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:18,310 INFO L93 Difference]: Finished difference Result 1397 states and 2244 transitions. [2018-09-26 21:13:18,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:13:18,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-26 21:13:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:18,314 INFO L225 Difference]: With dead ends: 1397 [2018-09-26 21:13:18,314 INFO L226 Difference]: Without dead ends: 1125 [2018-09-26 21:13:18,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:13:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-26 21:13:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 995. [2018-09-26 21:13:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-26 21:13:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1627 transitions. [2018-09-26 21:13:18,488 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1627 transitions. Word has length 13 [2018-09-26 21:13:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:18,488 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1627 transitions. [2018-09-26 21:13:18,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:13:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1627 transitions. [2018-09-26 21:13:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:13:18,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:18,489 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:18,489 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:18,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:18,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2129075237, now seen corresponding path program 1 times [2018-09-26 21:13:18,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:18,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:18,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:18,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:18,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:18,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:18,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:18,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:18,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:18,680 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:13:18,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-26 21:13:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:18,681 INFO L87 Difference]: Start difference. First operand 995 states and 1627 transitions. Second operand 14 states. [2018-09-26 21:13:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:20,897 INFO L93 Difference]: Finished difference Result 2724 states and 4397 transitions. [2018-09-26 21:13:20,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:13:20,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:13:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:20,903 INFO L225 Difference]: With dead ends: 2724 [2018-09-26 21:13:20,903 INFO L226 Difference]: Without dead ends: 1719 [2018-09-26 21:13:20,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:13:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2018-09-26 21:13:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1241. [2018-09-26 21:13:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2018-09-26 21:13:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2017 transitions. [2018-09-26 21:13:21,131 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2017 transitions. Word has length 13 [2018-09-26 21:13:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:21,132 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 2017 transitions. [2018-09-26 21:13:21,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2017 transitions. [2018-09-26 21:13:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:13:21,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:21,133 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:21,133 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:21,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1374164806, now seen corresponding path program 1 times [2018-09-26 21:13:21,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:21,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:21,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:21,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:21,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:21,257 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 21:13:21,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:21,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:13:21,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:21,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:21,358 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 21:13:21,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:21,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2018-09-26 21:13:21,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:13:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:13:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:13:21,380 INFO L87 Difference]: Start difference. First operand 1241 states and 2017 transitions. Second operand 15 states. [2018-09-26 21:13:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:22,996 INFO L93 Difference]: Finished difference Result 1442 states and 2324 transitions. [2018-09-26 21:13:22,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:13:22,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-26 21:13:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:23,002 INFO L225 Difference]: With dead ends: 1442 [2018-09-26 21:13:23,002 INFO L226 Difference]: Without dead ends: 1440 [2018-09-26 21:13:23,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:13:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2018-09-26 21:13:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1225. [2018-09-26 21:13:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2018-09-26 21:13:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1983 transitions. [2018-09-26 21:13:23,242 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1983 transitions. Word has length 15 [2018-09-26 21:13:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:23,242 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 1983 transitions. [2018-09-26 21:13:23,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:13:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1983 transitions. [2018-09-26 21:13:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:13:23,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:23,243 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:23,243 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:23,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:23,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1511389740, now seen corresponding path program 1 times [2018-09-26 21:13:23,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:23,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:23,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:23,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:23,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:24,034 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 21:13:24,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:24,035 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 21:13:24,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:24,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:24,129 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 21:13:24,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:24,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2018-09-26 21:13:24,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:13:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:13:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:13:24,155 INFO L87 Difference]: Start difference. First operand 1225 states and 1983 transitions. Second operand 12 states. [2018-09-26 21:13:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:25,155 INFO L93 Difference]: Finished difference Result 1389 states and 2225 transitions. [2018-09-26 21:13:25,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:13:25,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-09-26 21:13:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:25,160 INFO L225 Difference]: With dead ends: 1389 [2018-09-26 21:13:25,160 INFO L226 Difference]: Without dead ends: 1387 [2018-09-26 21:13:25,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:13:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2018-09-26 21:13:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1211. [2018-09-26 21:13:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-26 21:13:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1953 transitions. [2018-09-26 21:13:25,392 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1953 transitions. Word has length 15 [2018-09-26 21:13:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:25,392 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1953 transitions. [2018-09-26 21:13:25,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:13:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1953 transitions. [2018-09-26 21:13:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:13:25,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:25,393 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:25,394 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:25,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash -593242831, now seen corresponding path program 1 times [2018-09-26 21:13:25,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:25,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:25,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:25,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:25,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:25,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:25,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:25,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:25,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:25,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:25,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-26 21:13:25,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:13:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:13:25,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:13:25,624 INFO L87 Difference]: Start difference. First operand 1211 states and 1953 transitions. Second operand 14 states. [2018-09-26 21:13:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:27,350 INFO L93 Difference]: Finished difference Result 1445 states and 2303 transitions. [2018-09-26 21:13:27,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:13:27,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-09-26 21:13:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:27,357 INFO L225 Difference]: With dead ends: 1445 [2018-09-26 21:13:27,357 INFO L226 Difference]: Without dead ends: 1443 [2018-09-26 21:13:27,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:13:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2018-09-26 21:13:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1205. [2018-09-26 21:13:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-26 21:13:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-26 21:13:27,652 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-26 21:13:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:27,652 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-26 21:13:27,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:13:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-26 21:13:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:13:27,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:27,653 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:27,654 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:27,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1223170690, now seen corresponding path program 1 times [2018-09-26 21:13:27,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:27,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:27,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:27,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:27,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:27,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:27,734 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 21:13:27,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:27,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:27,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:27,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-26 21:13:27,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:13:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:13:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:13:27,849 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 12 states. [2018-09-26 21:13:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:29,357 INFO L93 Difference]: Finished difference Result 1420 states and 2265 transitions. [2018-09-26 21:13:29,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:13:29,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-26 21:13:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:29,362 INFO L225 Difference]: With dead ends: 1420 [2018-09-26 21:13:29,362 INFO L226 Difference]: Without dead ends: 1418 [2018-09-26 21:13:29,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:13:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-09-26 21:13:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1213. [2018-09-26 21:13:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2018-09-26 21:13:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1951 transitions. [2018-09-26 21:13:29,586 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1951 transitions. Word has length 16 [2018-09-26 21:13:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:29,587 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 1951 transitions. [2018-09-26 21:13:29,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:13:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1951 transitions. [2018-09-26 21:13:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:13:29,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:29,588 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:29,588 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:29,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash -767609008, now seen corresponding path program 2 times [2018-09-26 21:13:29,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:29,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:29,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:29,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:29,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:29,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:29,656 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 21:13:29,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:13:29,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:13:29,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:29,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:29,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:29,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-26 21:13:29,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:13:29,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:13:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:13:29,755 INFO L87 Difference]: Start difference. First operand 1213 states and 1951 transitions. Second operand 11 states. [2018-09-26 21:13:30,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:30,632 INFO L93 Difference]: Finished difference Result 1334 states and 2129 transitions. [2018-09-26 21:13:30,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:13:30,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-26 21:13:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:30,638 INFO L225 Difference]: With dead ends: 1334 [2018-09-26 21:13:30,638 INFO L226 Difference]: Without dead ends: 1332 [2018-09-26 21:13:30,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:13:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2018-09-26 21:13:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1205. [2018-09-26 21:13:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-26 21:13:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-26 21:13:30,882 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-26 21:13:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:30,883 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-26 21:13:30,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:13:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-26 21:13:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:13:30,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:30,884 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:30,884 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:30,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:30,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1823106549, now seen corresponding path program 1 times [2018-09-26 21:13:30,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:30,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:30,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:30,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:30,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:31,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:31,527 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 21:13:31,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:31,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:31,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:31,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-26 21:13:31,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:13:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:13:31,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:13:31,627 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 11 states. [2018-09-26 21:13:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:32,512 INFO L93 Difference]: Finished difference Result 1330 states and 2118 transitions. [2018-09-26 21:13:32,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:13:32,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-26 21:13:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:32,518 INFO L225 Difference]: With dead ends: 1330 [2018-09-26 21:13:32,518 INFO L226 Difference]: Without dead ends: 1328 [2018-09-26 21:13:32,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:13:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2018-09-26 21:13:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1211. [2018-09-26 21:13:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-26 21:13:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1948 transitions. [2018-09-26 21:13:32,804 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1948 transitions. Word has length 16 [2018-09-26 21:13:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:32,805 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1948 transitions. [2018-09-26 21:13:32,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:13:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1948 transitions. [2018-09-26 21:13:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:13:32,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:32,806 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:32,806 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:32,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash 481081049, now seen corresponding path program 2 times [2018-09-26 21:13:32,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:32,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:32,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:32,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:32,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:32,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:32,920 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 21:13:32,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:13:32,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:13:32,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:32,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:33,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:33,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-26 21:13:33,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:13:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:13:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:13:33,022 INFO L87 Difference]: Start difference. First operand 1211 states and 1948 transitions. Second operand 12 states. [2018-09-26 21:13:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:34,364 INFO L93 Difference]: Finished difference Result 1430 states and 2273 transitions. [2018-09-26 21:13:34,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:13:34,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-26 21:13:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:34,369 INFO L225 Difference]: With dead ends: 1430 [2018-09-26 21:13:34,369 INFO L226 Difference]: Without dead ends: 1428 [2018-09-26 21:13:34,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:13:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2018-09-26 21:13:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1205. [2018-09-26 21:13:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-26 21:13:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-26 21:13:34,621 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-26 21:13:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:34,622 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-26 21:13:34,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:13:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-26 21:13:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:13:34,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:34,623 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:34,623 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:34,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1936399254, now seen corresponding path program 1 times [2018-09-26 21:13:34,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:34,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:34,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:34,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:34,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:35,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:35,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:35,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:35,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:35,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:35,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-09-26 21:13:35,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:13:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:13:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:13:35,482 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 13 states. [2018-09-26 21:13:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:37,237 INFO L93 Difference]: Finished difference Result 1432 states and 2278 transitions. [2018-09-26 21:13:37,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:13:37,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-09-26 21:13:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:37,240 INFO L225 Difference]: With dead ends: 1432 [2018-09-26 21:13:37,240 INFO L226 Difference]: Without dead ends: 1430 [2018-09-26 21:13:37,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:13:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2018-09-26 21:13:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1199. [2018-09-26 21:13:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2018-09-26 21:13:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1923 transitions. [2018-09-26 21:13:37,493 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1923 transitions. Word has length 16 [2018-09-26 21:13:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:37,493 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 1923 transitions. [2018-09-26 21:13:37,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:13:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1923 transitions. [2018-09-26 21:13:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:13:37,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:37,495 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:37,495 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:37,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1085218294, now seen corresponding path program 1 times [2018-09-26 21:13:37,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:37,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:37,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:37,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:37,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:37,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:37,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:37,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:37,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:37,813 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:13:37,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2018-09-26 21:13:37,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:13:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:13:37,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:13:37,814 INFO L87 Difference]: Start difference. First operand 1199 states and 1923 transitions. Second operand 17 states. [2018-09-26 21:13:40,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:40,378 INFO L93 Difference]: Finished difference Result 1695 states and 2653 transitions. [2018-09-26 21:13:40,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:13:40,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-26 21:13:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:40,381 INFO L225 Difference]: With dead ends: 1695 [2018-09-26 21:13:40,381 INFO L226 Difference]: Without dead ends: 1376 [2018-09-26 21:13:40,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:13:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2018-09-26 21:13:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1028. [2018-09-26 21:13:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-26 21:13:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1643 transitions. [2018-09-26 21:13:40,611 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1643 transitions. Word has length 18 [2018-09-26 21:13:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:40,611 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1643 transitions. [2018-09-26 21:13:40,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:13:40,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1643 transitions. [2018-09-26 21:13:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:13:40,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:40,613 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:40,613 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:40,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1597439053, now seen corresponding path program 1 times [2018-09-26 21:13:40,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:40,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:40,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:40,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:40,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:40,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:40,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:40,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:40,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:40,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:40,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-26 21:13:40,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:13:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:13:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:13:40,851 INFO L87 Difference]: Start difference. First operand 1028 states and 1643 transitions. Second operand 16 states. [2018-09-26 21:13:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:42,971 INFO L93 Difference]: Finished difference Result 1514 states and 2354 transitions. [2018-09-26 21:13:42,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:13:42,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-26 21:13:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:42,981 INFO L225 Difference]: With dead ends: 1514 [2018-09-26 21:13:42,981 INFO L226 Difference]: Without dead ends: 1219 [2018-09-26 21:13:42,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:13:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2018-09-26 21:13:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1024. [2018-09-26 21:13:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-09-26 21:13:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1632 transitions. [2018-09-26 21:13:43,360 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1632 transitions. Word has length 18 [2018-09-26 21:13:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:43,360 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1632 transitions. [2018-09-26 21:13:43,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:13:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1632 transitions. [2018-09-26 21:13:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:13:43,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:43,362 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:43,362 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:43,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1672170852, now seen corresponding path program 1 times [2018-09-26 21:13:43,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:43,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:43,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:43,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:43,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:13:43,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:43,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:43,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:43,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:44,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:44,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-09-26 21:13:44,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:13:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:13:44,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:13:44,125 INFO L87 Difference]: Start difference. First operand 1024 states and 1632 transitions. Second operand 16 states. [2018-09-26 21:13:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:45,824 INFO L93 Difference]: Finished difference Result 2556 states and 4045 transitions. [2018-09-26 21:13:45,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:13:45,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-26 21:13:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:45,827 INFO L225 Difference]: With dead ends: 2556 [2018-09-26 21:13:45,827 INFO L226 Difference]: Without dead ends: 1529 [2018-09-26 21:13:45,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:13:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-26 21:13:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1073. [2018-09-26 21:13:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-09-26 21:13:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1703 transitions. [2018-09-26 21:13:46,090 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1703 transitions. Word has length 18 [2018-09-26 21:13:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:46,091 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1703 transitions. [2018-09-26 21:13:46,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:13:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1703 transitions. [2018-09-26 21:13:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:13:46,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:46,092 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:46,092 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:46,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1136854538, now seen corresponding path program 1 times [2018-09-26 21:13:46,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:46,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:46,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:46,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:46,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:46,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:46,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:46,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:46,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-26 21:13:46,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:13:46,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:13:46,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:13:46,321 INFO L87 Difference]: Start difference. First operand 1073 states and 1703 transitions. Second operand 15 states. [2018-09-26 21:13:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:48,044 INFO L93 Difference]: Finished difference Result 1546 states and 2389 transitions. [2018-09-26 21:13:48,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:13:48,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-26 21:13:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:48,047 INFO L225 Difference]: With dead ends: 1546 [2018-09-26 21:13:48,047 INFO L226 Difference]: Without dead ends: 1291 [2018-09-26 21:13:48,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:13:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2018-09-26 21:13:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1056. [2018-09-26 21:13:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2018-09-26 21:13:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1674 transitions. [2018-09-26 21:13:48,379 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1674 transitions. Word has length 18 [2018-09-26 21:13:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:48,379 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 1674 transitions. [2018-09-26 21:13:48,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:13:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1674 transitions. [2018-09-26 21:13:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:13:48,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:48,380 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:48,381 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:48,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash 975863549, now seen corresponding path program 1 times [2018-09-26 21:13:48,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:48,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:48,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:48,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:48,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:48,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:48,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:48,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:48,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:48,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:48,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:13:48,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:13:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:13:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:13:48,483 INFO L87 Difference]: Start difference. First operand 1056 states and 1674 transitions. Second operand 7 states. [2018-09-26 21:13:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:49,171 INFO L93 Difference]: Finished difference Result 1635 states and 2515 transitions. [2018-09-26 21:13:49,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:13:49,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-09-26 21:13:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:49,174 INFO L225 Difference]: With dead ends: 1635 [2018-09-26 21:13:49,175 INFO L226 Difference]: Without dead ends: 1494 [2018-09-26 21:13:49,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:13:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2018-09-26 21:13:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1094. [2018-09-26 21:13:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2018-09-26 21:13:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1728 transitions. [2018-09-26 21:13:49,584 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1728 transitions. Word has length 18 [2018-09-26 21:13:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:49,584 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1728 transitions. [2018-09-26 21:13:49,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:13:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1728 transitions. [2018-09-26 21:13:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:13:49,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:49,585 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:13:49,585 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:49,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1152261854, now seen corresponding path program 1 times [2018-09-26 21:13:49,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:49,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:49,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:49,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:49,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:49,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:49,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:49,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:49,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:49,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:49,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2018-09-26 21:13:49,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:13:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:13:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:13:49,803 INFO L87 Difference]: Start difference. First operand 1094 states and 1728 transitions. Second operand 17 states. [2018-09-26 21:13:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:53,332 INFO L93 Difference]: Finished difference Result 2230 states and 3534 transitions. [2018-09-26 21:13:53,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:13:53,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-09-26 21:13:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:53,336 INFO L225 Difference]: With dead ends: 2230 [2018-09-26 21:13:53,336 INFO L226 Difference]: Without dead ends: 2180 [2018-09-26 21:13:53,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1477, Invalid=4529, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:13:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2018-09-26 21:13:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1150. [2018-09-26 21:13:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2018-09-26 21:13:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1853 transitions. [2018-09-26 21:13:53,816 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1853 transitions. Word has length 20 [2018-09-26 21:13:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:53,817 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 1853 transitions. [2018-09-26 21:13:53,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:13:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1853 transitions. [2018-09-26 21:13:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:13:53,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:53,818 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:53,818 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:53,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash -79326665, now seen corresponding path program 1 times [2018-09-26 21:13:53,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:53,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:53,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:53,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:53,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:13:54,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:54,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:54,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:54,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:13:54,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:54,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:13:54,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:13:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:13:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:13:54,060 INFO L87 Difference]: Start difference. First operand 1150 states and 1853 transitions. Second operand 7 states. [2018-09-26 21:13:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:54,625 INFO L93 Difference]: Finished difference Result 1760 states and 2751 transitions. [2018-09-26 21:13:54,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:13:54,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-09-26 21:13:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:54,628 INFO L225 Difference]: With dead ends: 1760 [2018-09-26 21:13:54,628 INFO L226 Difference]: Without dead ends: 1507 [2018-09-26 21:13:54,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:13:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-26 21:13:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1026. [2018-09-26 21:13:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2018-09-26 21:13:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1655 transitions. [2018-09-26 21:13:54,891 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1655 transitions. Word has length 20 [2018-09-26 21:13:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:54,891 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 1655 transitions. [2018-09-26 21:13:54,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:13:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1655 transitions. [2018-09-26 21:13:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:13:54,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:54,892 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:13:54,892 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:54,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -79325383, now seen corresponding path program 1 times [2018-09-26 21:13:54,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:54,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:54,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:54,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:54,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:55,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:55,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:55,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:55,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:55,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:55,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2018-09-26 21:13:55,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:13:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:13:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:13:55,291 INFO L87 Difference]: Start difference. First operand 1026 states and 1655 transitions. Second operand 13 states. [2018-09-26 21:13:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:57,408 INFO L93 Difference]: Finished difference Result 1878 states and 3019 transitions. [2018-09-26 21:13:57,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:13:57,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-09-26 21:13:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:57,410 INFO L225 Difference]: With dead ends: 1878 [2018-09-26 21:13:57,410 INFO L226 Difference]: Without dead ends: 1729 [2018-09-26 21:13:57,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:13:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-09-26 21:13:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1013. [2018-09-26 21:13:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2018-09-26 21:13:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1646 transitions. [2018-09-26 21:13:57,721 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1646 transitions. Word has length 20 [2018-09-26 21:13:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:57,721 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 1646 transitions. [2018-09-26 21:13:57,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:13:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1646 transitions. [2018-09-26 21:13:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:13:57,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:57,722 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:13:57,722 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:57,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1614386347, now seen corresponding path program 1 times [2018-09-26 21:13:57,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:57,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:57,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:57,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:57,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:13:57,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:57,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:57,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:57,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:58,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:58,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-26 21:13:58,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:13:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:13:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:13:58,205 INFO L87 Difference]: Start difference. First operand 1013 states and 1646 transitions. Second operand 20 states. [2018-09-26 21:14:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:01,727 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2018-09-26 21:14:01,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:14:01,727 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-26 21:14:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:01,729 INFO L225 Difference]: With dead ends: 2738 [2018-09-26 21:14:01,729 INFO L226 Difference]: Without dead ends: 1726 [2018-09-26 21:14:01,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1197, Invalid=6813, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:14:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2018-09-26 21:14:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1481. [2018-09-26 21:14:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2018-09-26 21:14:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2418 transitions. [2018-09-26 21:14:02,081 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2418 transitions. Word has length 21 [2018-09-26 21:14:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:02,081 INFO L480 AbstractCegarLoop]: Abstraction has 1481 states and 2418 transitions. [2018-09-26 21:14:02,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:14:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2418 transitions. [2018-09-26 21:14:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:02,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:02,082 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:02,082 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:02,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1615679213, now seen corresponding path program 1 times [2018-09-26 21:14:02,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:02,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:02,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:02,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:02,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:02,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:02,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:02,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:02,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:02,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:02,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-26 21:14:02,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:14:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:14:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:14:02,353 INFO L87 Difference]: Start difference. First operand 1481 states and 2418 transitions. Second operand 18 states. [2018-09-26 21:14:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:06,610 INFO L93 Difference]: Finished difference Result 2759 states and 4491 transitions. [2018-09-26 21:14:06,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:14:06,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-26 21:14:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:06,613 INFO L225 Difference]: With dead ends: 2759 [2018-09-26 21:14:06,613 INFO L226 Difference]: Without dead ends: 2757 [2018-09-26 21:14:06,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=899, Invalid=4503, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:14:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-09-26 21:14:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1886. [2018-09-26 21:14:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2018-09-26 21:14:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3096 transitions. [2018-09-26 21:14:07,077 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3096 transitions. Word has length 21 [2018-09-26 21:14:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:07,077 INFO L480 AbstractCegarLoop]: Abstraction has 1886 states and 3096 transitions. [2018-09-26 21:14:07,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:14:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3096 transitions. [2018-09-26 21:14:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:07,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:07,078 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:07,078 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:07,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1336385522, now seen corresponding path program 1 times [2018-09-26 21:14:07,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:07,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:07,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:07,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:07,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:07,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:07,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:07,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:07,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:07,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:07,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-26 21:14:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:14:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:14:07,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:14:07,697 INFO L87 Difference]: Start difference. First operand 1886 states and 3096 transitions. Second operand 16 states. [2018-09-26 21:14:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:11,157 INFO L93 Difference]: Finished difference Result 2657 states and 4320 transitions. [2018-09-26 21:14:11,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:14:11,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-26 21:14:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:11,160 INFO L225 Difference]: With dead ends: 2657 [2018-09-26 21:14:11,160 INFO L226 Difference]: Without dead ends: 2655 [2018-09-26 21:14:11,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:14:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2018-09-26 21:14:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1726. [2018-09-26 21:14:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-09-26 21:14:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2827 transitions. [2018-09-26 21:14:11,615 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2827 transitions. Word has length 21 [2018-09-26 21:14:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:11,615 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2827 transitions. [2018-09-26 21:14:11,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:14:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2827 transitions. [2018-09-26 21:14:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:11,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:11,616 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:11,616 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:11,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1327798635, now seen corresponding path program 1 times [2018-09-26 21:14:11,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:11,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:11,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:11,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:11,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:11,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:11,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:11,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:11,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:11,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:11,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-26 21:14:11,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:14:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:14:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:14:11,914 INFO L87 Difference]: Start difference. First operand 1726 states and 2827 transitions. Second operand 17 states. [2018-09-26 21:14:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:15,882 INFO L93 Difference]: Finished difference Result 2434 states and 3937 transitions. [2018-09-26 21:14:15,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:14:15,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-26 21:14:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:15,885 INFO L225 Difference]: With dead ends: 2434 [2018-09-26 21:14:15,885 INFO L226 Difference]: Without dead ends: 2432 [2018-09-26 21:14:15,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=632, Invalid=3150, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:14:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2018-09-26 21:14:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1872. [2018-09-26 21:14:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2018-09-26 21:14:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3060 transitions. [2018-09-26 21:14:16,731 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3060 transitions. Word has length 21 [2018-09-26 21:14:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:16,732 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 3060 transitions. [2018-09-26 21:14:16,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:14:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3060 transitions. [2018-09-26 21:14:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:16,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:16,733 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:16,734 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:16,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:16,734 INFO L82 PathProgramCache]: Analyzing trace with hash 133649308, now seen corresponding path program 2 times [2018-09-26 21:14:16,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:16,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:16,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:16,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:16,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:17,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:17,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:17,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:14:17,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:14:17,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:17,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:14:17,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:17,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-26 21:14:17,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:14:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:14:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:14:17,693 INFO L87 Difference]: Start difference. First operand 1872 states and 3060 transitions. Second operand 16 states. [2018-09-26 21:14:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:20,766 INFO L93 Difference]: Finished difference Result 2526 states and 4072 transitions. [2018-09-26 21:14:20,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:14:20,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-26 21:14:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:20,769 INFO L225 Difference]: With dead ends: 2526 [2018-09-26 21:14:20,769 INFO L226 Difference]: Without dead ends: 2334 [2018-09-26 21:14:20,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:14:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2018-09-26 21:14:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2001. [2018-09-26 21:14:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2001 states. [2018-09-26 21:14:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 3219 transitions. [2018-09-26 21:14:21,291 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 3219 transitions. Word has length 21 [2018-09-26 21:14:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:21,291 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 3219 transitions. [2018-09-26 21:14:21,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:14:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 3219 transitions. [2018-09-26 21:14:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:21,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:21,292 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:21,293 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:21,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1958649716, now seen corresponding path program 1 times [2018-09-26 21:14:21,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:21,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:21,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:21,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:21,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:21,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:21,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:21,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-26 21:14:21,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:14:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:14:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:14:21,870 INFO L87 Difference]: Start difference. First operand 2001 states and 3219 transitions. Second operand 18 states. [2018-09-26 21:14:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:26,874 INFO L93 Difference]: Finished difference Result 2607 states and 4131 transitions. [2018-09-26 21:14:26,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:14:26,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-26 21:14:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:26,877 INFO L225 Difference]: With dead ends: 2607 [2018-09-26 21:14:26,877 INFO L226 Difference]: Without dead ends: 2605 [2018-09-26 21:14:26,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1198, Invalid=4808, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:14:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2018-09-26 21:14:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1559. [2018-09-26 21:14:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2018-09-26 21:14:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2486 transitions. [2018-09-26 21:14:27,311 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2486 transitions. Word has length 21 [2018-09-26 21:14:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:27,311 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 2486 transitions. [2018-09-26 21:14:27,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:14:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2486 transitions. [2018-09-26 21:14:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:27,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:27,313 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:27,313 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:27,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:27,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1950062829, now seen corresponding path program 1 times [2018-09-26 21:14:27,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:27,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:27,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:27,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:27,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:27,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:27,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:27,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:27,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:27,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:27,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-26 21:14:27,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:14:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:14:27,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:14:27,589 INFO L87 Difference]: Start difference. First operand 1559 states and 2486 transitions. Second operand 18 states. [2018-09-26 21:14:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:32,799 INFO L93 Difference]: Finished difference Result 2107 states and 3306 transitions. [2018-09-26 21:14:32,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:14:32,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-26 21:14:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:32,802 INFO L225 Difference]: With dead ends: 2107 [2018-09-26 21:14:32,802 INFO L226 Difference]: Without dead ends: 2105 [2018-09-26 21:14:32,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:14:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2018-09-26 21:14:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1432. [2018-09-26 21:14:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-09-26 21:14:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2283 transitions. [2018-09-26 21:14:33,235 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2283 transitions. Word has length 21 [2018-09-26 21:14:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:33,235 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 2283 transitions. [2018-09-26 21:14:33,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:14:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2283 transitions. [2018-09-26 21:14:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:33,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:33,236 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:33,236 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:33,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash 830618954, now seen corresponding path program 2 times [2018-09-26 21:14:33,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:33,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:33,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:33,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:33,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:33,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:33,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:33,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:14:33,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:14:33,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:33,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:14:33,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:33,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-26 21:14:33,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:14:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:14:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:14:33,477 INFO L87 Difference]: Start difference. First operand 1432 states and 2283 transitions. Second operand 15 states. [2018-09-26 21:14:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:36,606 INFO L93 Difference]: Finished difference Result 1886 states and 2991 transitions. [2018-09-26 21:14:36,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:14:36,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-26 21:14:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:36,609 INFO L225 Difference]: With dead ends: 1886 [2018-09-26 21:14:36,609 INFO L226 Difference]: Without dead ends: 1884 [2018-09-26 21:14:36,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=644, Invalid=3138, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:14:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-26 21:14:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1404. [2018-09-26 21:14:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2018-09-26 21:14:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2237 transitions. [2018-09-26 21:14:37,034 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2237 transitions. Word has length 21 [2018-09-26 21:14:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:37,034 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2237 transitions. [2018-09-26 21:14:37,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:14:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2237 transitions. [2018-09-26 21:14:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:37,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:37,035 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:37,035 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:37,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash 822030785, now seen corresponding path program 1 times [2018-09-26 21:14:37,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:37,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:37,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:37,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:37,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:14:37,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:37,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:37,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:37,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:37,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:37,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-26 21:14:37,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:14:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:14:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:14:37,351 INFO L87 Difference]: Start difference. First operand 1404 states and 2237 transitions. Second operand 20 states. [2018-09-26 21:14:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:42,306 INFO L93 Difference]: Finished difference Result 2676 states and 4218 transitions. [2018-09-26 21:14:42,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:14:42,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-26 21:14:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:42,308 INFO L225 Difference]: With dead ends: 2676 [2018-09-26 21:14:42,308 INFO L226 Difference]: Without dead ends: 1637 [2018-09-26 21:14:42,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1444, Invalid=7486, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:14:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2018-09-26 21:14:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1391. [2018-09-26 21:14:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2018-09-26 21:14:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2209 transitions. [2018-09-26 21:14:42,793 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2209 transitions. Word has length 21 [2018-09-26 21:14:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:42,793 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2209 transitions. [2018-09-26 21:14:42,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:14:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2209 transitions. [2018-09-26 21:14:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:42,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:42,794 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:42,794 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:42,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash 822032067, now seen corresponding path program 2 times [2018-09-26 21:14:42,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:42,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:42,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:42,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:42,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:42,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:42,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:42,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:14:42,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:14:42,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:42,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:14:43,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:43,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2018-09-26 21:14:43,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:14:43,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:14:43,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:14:43,063 INFO L87 Difference]: Start difference. First operand 1391 states and 2209 transitions. Second operand 18 states. [2018-09-26 21:14:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:47,669 INFO L93 Difference]: Finished difference Result 2169 states and 3390 transitions. [2018-09-26 21:14:47,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:14:47,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-26 21:14:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:47,672 INFO L225 Difference]: With dead ends: 2169 [2018-09-26 21:14:47,672 INFO L226 Difference]: Without dead ends: 2167 [2018-09-26 21:14:47,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1116, Invalid=5856, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:14:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2018-09-26 21:14:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1375. [2018-09-26 21:14:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-09-26 21:14:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2186 transitions. [2018-09-26 21:14:48,168 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2186 transitions. Word has length 21 [2018-09-26 21:14:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:48,168 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2186 transitions. [2018-09-26 21:14:48,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:14:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2186 transitions. [2018-09-26 21:14:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:48,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:48,169 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:48,169 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:48,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:48,170 INFO L82 PathProgramCache]: Analyzing trace with hash -97849607, now seen corresponding path program 1 times [2018-09-26 21:14:48,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:48,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:48,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:48,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:48,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:14:48,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:48,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:48,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:48,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:48,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:48,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-26 21:14:48,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:14:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:14:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:14:48,480 INFO L87 Difference]: Start difference. First operand 1375 states and 2186 transitions. Second operand 19 states. [2018-09-26 21:14:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:51,800 INFO L93 Difference]: Finished difference Result 3096 states and 4913 transitions. [2018-09-26 21:14:51,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:14:51,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-26 21:14:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:51,802 INFO L225 Difference]: With dead ends: 3096 [2018-09-26 21:14:51,802 INFO L226 Difference]: Without dead ends: 1770 [2018-09-26 21:14:51,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=571, Invalid=2735, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:14:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2018-09-26 21:14:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1381. [2018-09-26 21:14:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2018-09-26 21:14:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2193 transitions. [2018-09-26 21:14:52,317 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2193 transitions. Word has length 21 [2018-09-26 21:14:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:52,317 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2193 transitions. [2018-09-26 21:14:52,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:14:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2193 transitions. [2018-09-26 21:14:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:52,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:52,318 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:52,318 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:52,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash 437466707, now seen corresponding path program 1 times [2018-09-26 21:14:52,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:52,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:52,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:52,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:52,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:52,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:52,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:52,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:52,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:14:52,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:52,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-26 21:14:52,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:14:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:14:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:14:52,500 INFO L87 Difference]: Start difference. First operand 1381 states and 2193 transitions. Second operand 13 states. [2018-09-26 21:14:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:54,440 INFO L93 Difference]: Finished difference Result 1858 states and 2972 transitions. [2018-09-26 21:14:54,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:14:54,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-26 21:14:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:54,443 INFO L225 Difference]: With dead ends: 1858 [2018-09-26 21:14:54,443 INFO L226 Difference]: Without dead ends: 1856 [2018-09-26 21:14:54,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:14:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2018-09-26 21:14:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1551. [2018-09-26 21:14:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2018-09-26 21:14:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2486 transitions. [2018-09-26 21:14:54,996 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2486 transitions. Word has length 21 [2018-09-26 21:14:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:54,997 INFO L480 AbstractCegarLoop]: Abstraction has 1551 states and 2486 transitions. [2018-09-26 21:14:54,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:14:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2486 transitions. [2018-09-26 21:14:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:54,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:54,998 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:54,998 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:54,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2130898623, now seen corresponding path program 2 times [2018-09-26 21:14:54,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:54,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:54,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:54,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:54,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:14:55,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:55,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:55,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:14:55,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:14:55,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:55,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:14:55,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:55,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-26 21:14:55,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:14:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:14:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:14:55,308 INFO L87 Difference]: Start difference. First operand 1551 states and 2486 transitions. Second operand 19 states. [2018-09-26 21:14:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:58,796 INFO L93 Difference]: Finished difference Result 1901 states and 3071 transitions. [2018-09-26 21:14:58,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:14:58,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-26 21:14:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:58,798 INFO L225 Difference]: With dead ends: 1901 [2018-09-26 21:14:58,798 INFO L226 Difference]: Without dead ends: 1899 [2018-09-26 21:14:58,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=3031, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:14:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2018-09-26 21:14:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1583. [2018-09-26 21:14:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2018-09-26 21:14:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2523 transitions. [2018-09-26 21:14:59,365 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2523 transitions. Word has length 21 [2018-09-26 21:14:59,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:59,365 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 2523 transitions. [2018-09-26 21:14:59,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:14:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2523 transitions. [2018-09-26 21:14:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:14:59,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:59,366 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:14:59,367 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:59,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2139486792, now seen corresponding path program 1 times [2018-09-26 21:14:59,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:59,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:59,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:59,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:59,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:59,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:59,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:59,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:15:00,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:00,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-26 21:15:00,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:15:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:15:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:15:00,037 INFO L87 Difference]: Start difference. First operand 1583 states and 2523 transitions. Second operand 13 states. [2018-09-26 21:15:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:02,973 INFO L93 Difference]: Finished difference Result 2207 states and 3564 transitions. [2018-09-26 21:15:02,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:15:02,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-26 21:15:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:02,975 INFO L225 Difference]: With dead ends: 2207 [2018-09-26 21:15:02,976 INFO L226 Difference]: Without dead ends: 2205 [2018-09-26 21:15:02,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:15:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2018-09-26 21:15:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1741. [2018-09-26 21:15:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2018-09-26 21:15:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2777 transitions. [2018-09-26 21:15:03,581 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2777 transitions. Word has length 21 [2018-09-26 21:15:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:03,581 INFO L480 AbstractCegarLoop]: Abstraction has 1741 states and 2777 transitions. [2018-09-26 21:15:03,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:15:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2777 transitions. [2018-09-26 21:15:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:15:03,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:03,582 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:03,582 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:03,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1673653662, now seen corresponding path program 2 times [2018-09-26 21:15:03,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:03,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:03,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:04,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:04,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:04,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:15:04,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:15:04,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:04,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:04,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:04,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-26 21:15:04,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:15:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:15:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:15:04,597 INFO L87 Difference]: Start difference. First operand 1741 states and 2777 transitions. Second operand 15 states. [2018-09-26 21:15:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:08,912 INFO L93 Difference]: Finished difference Result 3370 states and 5507 transitions. [2018-09-26 21:15:08,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:15:08,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-26 21:15:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:08,916 INFO L225 Difference]: With dead ends: 3370 [2018-09-26 21:15:08,916 INFO L226 Difference]: Without dead ends: 3368 [2018-09-26 21:15:08,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=719, Invalid=2941, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:15:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2018-09-26 21:15:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2044. [2018-09-26 21:15:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-09-26 21:15:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3284 transitions. [2018-09-26 21:15:09,630 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3284 transitions. Word has length 21 [2018-09-26 21:15:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:09,631 INFO L480 AbstractCegarLoop]: Abstraction has 2044 states and 3284 transitions. [2018-09-26 21:15:09,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:15:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3284 transitions. [2018-09-26 21:15:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:15:09,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:09,632 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:09,632 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:09,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash 212422270, now seen corresponding path program 2 times [2018-09-26 21:15:09,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:09,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:09,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:09,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:09,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-26 21:15:09,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:09,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:09,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:15:09,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:15:09,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:09,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-26 21:15:09,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:09,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-26 21:15:09,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:15:09,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:15:09,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:15:09,818 INFO L87 Difference]: Start difference. First operand 2044 states and 3284 transitions. Second operand 12 states. [2018-09-26 21:15:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:12,456 INFO L93 Difference]: Finished difference Result 5216 states and 8321 transitions. [2018-09-26 21:15:12,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:15:12,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-09-26 21:15:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:12,460 INFO L225 Difference]: With dead ends: 5216 [2018-09-26 21:15:12,460 INFO L226 Difference]: Without dead ends: 3229 [2018-09-26 21:15:12,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:15:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2018-09-26 21:15:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2942. [2018-09-26 21:15:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2942 states. [2018-09-26 21:15:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4622 transitions. [2018-09-26 21:15:13,484 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4622 transitions. Word has length 21 [2018-09-26 21:15:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:13,485 INFO L480 AbstractCegarLoop]: Abstraction has 2942 states and 4622 transitions. [2018-09-26 21:15:13,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:15:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4622 transitions. [2018-09-26 21:15:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:15:13,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:13,486 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:13,486 INFO L423 AbstractCegarLoop]: === Iteration 62 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:13,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1977173104, now seen corresponding path program 1 times [2018-09-26 21:15:13,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:13,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:13,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:13,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:13,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:13,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:13,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:13,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:13,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:13,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:13,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-26 21:15:13,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:15:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:15:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:15:13,878 INFO L87 Difference]: Start difference. First operand 2942 states and 4622 transitions. Second operand 22 states. [2018-09-26 21:15:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:22,423 INFO L93 Difference]: Finished difference Result 4706 states and 7339 transitions. [2018-09-26 21:15:22,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:15:22,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-26 21:15:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:22,428 INFO L225 Difference]: With dead ends: 4706 [2018-09-26 21:15:22,428 INFO L226 Difference]: Without dead ends: 4704 [2018-09-26 21:15:22,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2033, Invalid=12009, Unknown=0, NotChecked=0, Total=14042 [2018-09-26 21:15:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2018-09-26 21:15:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3514. [2018-09-26 21:15:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-09-26 21:15:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5500 transitions. [2018-09-26 21:15:23,908 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5500 transitions. Word has length 23 [2018-09-26 21:15:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:23,908 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 5500 transitions. [2018-09-26 21:15:23,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:15:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5500 transitions. [2018-09-26 21:15:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:15:23,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:23,909 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:23,910 INFO L423 AbstractCegarLoop]: === Iteration 63 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:23,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1266805704, now seen corresponding path program 1 times [2018-09-26 21:15:23,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:23,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:23,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:23,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:23,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:24,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:24,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:24,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:24,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:15:24,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:24,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-26 21:15:24,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:15:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:15:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:15:24,230 INFO L87 Difference]: Start difference. First operand 3514 states and 5500 transitions. Second operand 21 states. [2018-09-26 21:15:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:31,111 INFO L93 Difference]: Finished difference Result 4911 states and 7636 transitions. [2018-09-26 21:15:31,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:15:31,111 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2018-09-26 21:15:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:31,115 INFO L225 Difference]: With dead ends: 4911 [2018-09-26 21:15:31,115 INFO L226 Difference]: Without dead ends: 4904 [2018-09-26 21:15:31,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:15:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2018-09-26 21:15:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2925. [2018-09-26 21:15:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-09-26 21:15:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4501 transitions. [2018-09-26 21:15:32,830 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4501 transitions. Word has length 23 [2018-09-26 21:15:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:32,830 INFO L480 AbstractCegarLoop]: Abstraction has 2925 states and 4501 transitions. [2018-09-26 21:15:32,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:15:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4501 transitions. [2018-09-26 21:15:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:15:32,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:32,832 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:32,832 INFO L423 AbstractCegarLoop]: === Iteration 64 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:32,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -407447728, now seen corresponding path program 1 times [2018-09-26 21:15:32,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:32,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:32,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:32,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:32,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:33,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:33,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:33,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:33,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:15:33,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:33,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-26 21:15:33,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:15:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:15:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:15:33,252 INFO L87 Difference]: Start difference. First operand 2925 states and 4501 transitions. Second operand 22 states. [2018-09-26 21:15:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:38,540 INFO L93 Difference]: Finished difference Result 3641 states and 5640 transitions. [2018-09-26 21:15:38,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:15:38,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-26 21:15:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:38,544 INFO L225 Difference]: With dead ends: 3641 [2018-09-26 21:15:38,544 INFO L226 Difference]: Without dead ends: 3634 [2018-09-26 21:15:38,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=768, Invalid=3788, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:15:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2018-09-26 21:15:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2472. [2018-09-26 21:15:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2018-09-26 21:15:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3826 transitions. [2018-09-26 21:15:39,734 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3826 transitions. Word has length 23 [2018-09-26 21:15:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:39,734 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 3826 transitions. [2018-09-26 21:15:39,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:15:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3826 transitions. [2018-09-26 21:15:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:15:39,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:39,736 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:39,736 INFO L423 AbstractCegarLoop]: === Iteration 65 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:39,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1545525427, now seen corresponding path program 1 times [2018-09-26 21:15:39,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:39,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:39,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:39,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:39,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:39,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:39,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:39,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:39,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:15:39,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:39,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-26 21:15:39,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:15:39,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:15:39,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:15:39,978 INFO L87 Difference]: Start difference. First operand 2472 states and 3826 transitions. Second operand 15 states. [2018-09-26 21:15:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:44,013 INFO L93 Difference]: Finished difference Result 3028 states and 4680 transitions. [2018-09-26 21:15:44,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:15:44,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-26 21:15:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:44,015 INFO L225 Difference]: With dead ends: 3028 [2018-09-26 21:15:44,016 INFO L226 Difference]: Without dead ends: 3026 [2018-09-26 21:15:44,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:15:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2018-09-26 21:15:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2443. [2018-09-26 21:15:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2018-09-26 21:15:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3774 transitions. [2018-09-26 21:15:45,305 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3774 transitions. Word has length 24 [2018-09-26 21:15:45,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:45,305 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 3774 transitions. [2018-09-26 21:15:45,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:15:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3774 transitions. [2018-09-26 21:15:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:15:45,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:45,307 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:15:45,307 INFO L423 AbstractCegarLoop]: === Iteration 66 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:45,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:45,307 INFO L82 PathProgramCache]: Analyzing trace with hash -136248690, now seen corresponding path program 3 times [2018-09-26 21:15:45,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:45,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:45,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:45,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:45,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:15:45,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:45,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:45,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:15:45,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-26 21:15:45,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:45,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-26 21:15:45,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:45,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-26 21:15:45,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:15:45,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:15:45,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:15:45,783 INFO L87 Difference]: Start difference. First operand 2443 states and 3774 transitions. Second operand 15 states. [2018-09-26 21:15:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:48,777 INFO L93 Difference]: Finished difference Result 2592 states and 4005 transitions. [2018-09-26 21:15:48,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:15:48,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-26 21:15:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:48,779 INFO L225 Difference]: With dead ends: 2592 [2018-09-26 21:15:48,780 INFO L226 Difference]: Without dead ends: 2590 [2018-09-26 21:15:48,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:15:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2018-09-26 21:15:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2279. [2018-09-26 21:15:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2018-09-26 21:15:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3506 transitions. [2018-09-26 21:15:50,052 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3506 transitions. Word has length 24 [2018-09-26 21:15:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:50,052 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 3506 transitions. [2018-09-26 21:15:50,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:15:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3506 transitions. [2018-09-26 21:15:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:15:50,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:50,053 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:50,053 INFO L423 AbstractCegarLoop]: === Iteration 67 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:50,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:50,054 INFO L82 PathProgramCache]: Analyzing trace with hash -518454402, now seen corresponding path program 1 times [2018-09-26 21:15:50,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:50,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:50,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:50,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:50,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:50,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:50,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:50,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:50,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:15:50,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:50,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-26 21:15:50,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:15:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:15:50,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:15:50,300 INFO L87 Difference]: Start difference. First operand 2279 states and 3506 transitions. Second operand 16 states. [2018-09-26 21:15:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:53,673 INFO L93 Difference]: Finished difference Result 2414 states and 3709 transitions. [2018-09-26 21:15:53,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:15:53,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-26 21:15:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:53,676 INFO L225 Difference]: With dead ends: 2414 [2018-09-26 21:15:53,676 INFO L226 Difference]: Without dead ends: 2412 [2018-09-26 21:15:53,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:15:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2018-09-26 21:15:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2274. [2018-09-26 21:15:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2274 states. [2018-09-26 21:15:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3496 transitions. [2018-09-26 21:15:55,003 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3496 transitions. Word has length 24 [2018-09-26 21:15:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:55,003 INFO L480 AbstractCegarLoop]: Abstraction has 2274 states and 3496 transitions. [2018-09-26 21:15:55,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:15:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3496 transitions. [2018-09-26 21:15:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:15:55,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:55,005 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:15:55,005 INFO L423 AbstractCegarLoop]: === Iteration 68 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:55,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:55,006 INFO L82 PathProgramCache]: Analyzing trace with hash -916627202, now seen corresponding path program 1 times [2018-09-26 21:15:55,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:55,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:55,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:55,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:55,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:15:55,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:55,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:55,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:55,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-26 21:15:55,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:55,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-26 21:15:55,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:15:55,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:15:55,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:15:55,285 INFO L87 Difference]: Start difference. First operand 2274 states and 3496 transitions. Second operand 16 states. [2018-09-26 21:15:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:59,036 INFO L93 Difference]: Finished difference Result 2734 states and 4210 transitions. [2018-09-26 21:15:59,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:15:59,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-09-26 21:15:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:59,039 INFO L225 Difference]: With dead ends: 2734 [2018-09-26 21:15:59,039 INFO L226 Difference]: Without dead ends: 2732 [2018-09-26 21:15:59,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:15:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-09-26 21:16:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2357. [2018-09-26 21:16:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2018-09-26 21:16:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3634 transitions. [2018-09-26 21:16:00,446 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3634 transitions. Word has length 29 [2018-09-26 21:16:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:00,446 INFO L480 AbstractCegarLoop]: Abstraction has 2357 states and 3634 transitions. [2018-09-26 21:16:00,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:16:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3634 transitions. [2018-09-26 21:16:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:16:00,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:00,448 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:00,448 INFO L423 AbstractCegarLoop]: === Iteration 69 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:00,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash 524508242, now seen corresponding path program 1 times [2018-09-26 21:16:00,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:00,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:00,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:00,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:00,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:00,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:00,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:16:00,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:00,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:00,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:00,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-26 21:16:00,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:16:00,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:16:00,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:16:00,813 INFO L87 Difference]: Start difference. First operand 2357 states and 3634 transitions. Second operand 17 states. [2018-09-26 21:16:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:10,257 INFO L93 Difference]: Finished difference Result 5146 states and 8058 transitions. [2018-09-26 21:16:10,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:16:10,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-26 21:16:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:10,262 INFO L225 Difference]: With dead ends: 5146 [2018-09-26 21:16:10,262 INFO L226 Difference]: Without dead ends: 5144 [2018-09-26 21:16:10,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1591, Invalid=7915, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:16:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2018-09-26 21:16:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3465. [2018-09-26 21:16:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2018-09-26 21:16:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5438 transitions. [2018-09-26 21:16:12,269 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5438 transitions. Word has length 29 [2018-09-26 21:16:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:12,269 INFO L480 AbstractCegarLoop]: Abstraction has 3465 states and 5438 transitions. [2018-09-26 21:16:12,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:16:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5438 transitions. [2018-09-26 21:16:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:16:12,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:12,271 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:12,271 INFO L423 AbstractCegarLoop]: === Iteration 70 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:12,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1958472419, now seen corresponding path program 4 times [2018-09-26 21:16:12,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:12,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:12,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:12,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:12,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:12,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:12,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:16:12,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:16:12,425 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:16:12,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:12,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:12,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:12,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-26 21:16:12,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:16:12,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:16:12,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:16:12,653 INFO L87 Difference]: Start difference. First operand 3465 states and 5438 transitions. Second operand 17 states. [2018-09-26 21:16:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:21,708 INFO L93 Difference]: Finished difference Result 4974 states and 7795 transitions. [2018-09-26 21:16:21,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:16:21,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-26 21:16:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:21,713 INFO L225 Difference]: With dead ends: 4974 [2018-09-26 21:16:21,713 INFO L226 Difference]: Without dead ends: 4972 [2018-09-26 21:16:21,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1292, Invalid=5350, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:16:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2018-09-26 21:16:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 3050. [2018-09-26 21:16:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2018-09-26 21:16:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4722 transitions. [2018-09-26 21:16:23,646 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4722 transitions. Word has length 29 [2018-09-26 21:16:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:23,646 INFO L480 AbstractCegarLoop]: Abstraction has 3050 states and 4722 transitions. [2018-09-26 21:16:23,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:16:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4722 transitions. [2018-09-26 21:16:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:16:23,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:23,648 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:16:23,648 INFO L423 AbstractCegarLoop]: === Iteration 71 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:23,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1748672885, now seen corresponding path program 1 times [2018-09-26 21:16:23,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:23,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:23,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:16:23,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:23,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:23,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:16:23,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:23,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:24,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:24,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-26 21:16:24,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:16:24,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:16:24,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:16:24,084 INFO L87 Difference]: Start difference. First operand 3050 states and 4722 transitions. Second operand 24 states. Received shutdown request... [2018-09-26 21:16:44,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-09-26 21:16:44,745 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:16:44,750 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:16:44,750 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:16:44 BoogieIcfgContainer [2018-09-26 21:16:44,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:16:44,752 INFO L168 Benchmark]: Toolchain (without parser) took 251323.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -255.5 MB). Peak memory consumption was 477.0 MB. Max. memory is 7.1 GB. [2018-09-26 21:16:44,752 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:16:44,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:16:44,753 INFO L168 Benchmark]: Boogie Preprocessor took 24.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:16:44,753 INFO L168 Benchmark]: RCFGBuilder took 625.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:16:44,754 INFO L168 Benchmark]: TraceAbstraction took 250622.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -276.6 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:16:44,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 625.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250622.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -276.6 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 74). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 199 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (7102 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 94). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 199 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (7102 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 85). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 199 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (7102 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 199 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (7102 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 4 error locations. TIMEOUT Result, 250.5s OverallTime, 71 OverallIterations, 5 TraceHistogramMax, 193.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2683 SDtfs, 13924 SDslu, 9608 SDs, 0 SdLazy, 78848 SolverSat, 7622 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4001 GetRequests, 787 SyntacticMatches, 22 SemanticMatches, 3192 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 68003 ImplicationChecksByTransitivity, 86.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3514occurred in iteration=62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 29.4s AutomataMinimizationTime, 70 MinimizatonAttempts, 26954 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 24.1s InterpolantComputationTime, 2299 NumberOfCodeBlocks, 2293 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2164 ConstructedInterpolants, 169 QuantifiedInterpolants, 272436 SizeOfPredicates, 299 NumberOfNonLiveVariables, 3148 ConjunctsInSsa, 635 ConjunctsInUnsatCore, 135 InterpolantComputations, 14 PerfectInterpolantSequences, 245/1300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-16-44-766.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-16-44-766.csv Completed graceful shutdown