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_WithProcedures.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:17:51,051 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:17:51,054 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:17:51,073 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:17:51,073 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:17:51,075 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:17:51,076 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:17:51,079 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:17:51,082 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:17:51,084 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:17:51,087 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:17:51,087 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:17:51,088 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:17:51,089 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:17:51,093 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:17:51,094 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:17:51,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:17:51,096 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:17:51,108 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:17:51,110 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:17:51,111 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:17:51,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:17:51,117 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:17:51,127 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:17:51,142 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:17:51,143 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:17:51,144 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:17:51,144 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:17:51,144 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:17:51,145 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:17:51,145 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:17:51,145 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:17:51,145 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:17:51,145 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:17:51,146 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:17:51,146 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:17:51,146 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:17:51,146 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:17:51,146 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:17:51,147 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:17:51,147 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:17:51,147 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:17:51,147 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:17:51,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:17:51,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:17:51,148 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:17:51,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:17:51,148 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:17:51,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:17:51,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:17:51,149 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:17:51,149 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:17:51,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:17:51,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:17:51,205 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:17:51,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:17:51,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:17:51,224 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:17:51,225 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:17:51,226 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-23 21:17:51,226 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-23 21:17:51,282 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:17:51,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:17:51,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:17:51,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:17:51,286 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:17:51,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:17:51,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:17:51,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:17:51,331 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:17:51,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... [2018-09-23 21:17:51,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:17:51,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:17:51,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:17:51,357 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:17:51,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:17:51,442 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-23 21:17:51,443 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-23 21:17:51,443 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-23 21:17:51,443 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-23 21:17:51,444 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-23 21:17:51,444 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-23 21:17:51,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:17:51,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:17:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-23 21:17:51,446 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-23 21:17:52,036 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:17:52,037 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:17:52 BoogieIcfgContainer [2018-09-23 21:17:52,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:17:52,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:17:52,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:17:52,042 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:17:52,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:51" (1/2) ... [2018-09-23 21:17:52,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f23e64 and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:17:52, skipping insertion in model container [2018-09-23 21:17:52,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:17:52" (2/2) ... [2018-09-23 21:17:52,046 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-23 21:17:52,056 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:17:52,066 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-23 21:17:52,119 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:17:52,120 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:17:52,121 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:17:52,121 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:17:52,121 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:17:52,121 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:17:52,121 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:17:52,121 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:17:52,122 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:17:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-23 21:17:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:17:52,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:52,171 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:52,173 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:52,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-23 21:17:52,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:52,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:52,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:52,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:52,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:52,445 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:17:52,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 21:17:52,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:17:52,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:17:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:17:52,464 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-23 21:17:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:53,334 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-23 21:17:53,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:17:53,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-23 21:17:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:53,350 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:17:53,350 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:17:53,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:17:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:17:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-23 21:17:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:17:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-23 21:17:53,404 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-23 21:17:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:53,405 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-23 21:17:53,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:17:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-23 21:17:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:17:53,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:53,407 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:53,408 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:53,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-23 21:17:53,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:53,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:53,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:53,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:53,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:53,530 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:17:53,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 21:17:53,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:17:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:17:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:17:53,533 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-23 21:17:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:54,208 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-23 21:17:54,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:17:54,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-23 21:17:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:54,216 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:17:54,216 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:17:54,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:17:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:17:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-23 21:17:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:17:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-23 21:17:54,244 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-23 21:17:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:54,245 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-23 21:17:54,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:17:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-23 21:17:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:17:54,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:54,249 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:54,249 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:54,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-23 21:17:54,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:54,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:54,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:54,423 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:17:54,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-23 21:17:54,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:17:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:17:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:17:54,425 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-23 21:17:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:55,394 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-23 21:17:55,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:17:55,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-23 21:17:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:55,401 INFO L225 Difference]: With dead ends: 122 [2018-09-23 21:17:55,401 INFO L226 Difference]: Without dead ends: 120 [2018-09-23 21:17:55,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:17:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-23 21:17:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-23 21:17:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:17:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-23 21:17:55,420 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-23 21:17:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:55,421 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-23 21:17:55,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:17:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-23 21:17:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:17:55,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:55,423 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:55,423 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:55,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-23 21:17:55,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:55,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:55,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:55,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:55,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:55,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:55,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:17:55,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:55,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:55,986 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:17:55,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-23 21:17:55,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:17:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:17:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:17:55,988 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-23 21:17:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:56,712 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-23 21:17:56,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:17:56,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-23 21:17:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:56,715 INFO L225 Difference]: With dead ends: 168 [2018-09-23 21:17:56,715 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 21:17:56,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:17:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 21:17:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-23 21:17:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:17:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-23 21:17:56,740 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-23 21:17:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:56,740 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-23 21:17:56,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:17:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-23 21:17:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:17:56,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:56,742 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:56,743 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:56,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-23 21:17:56,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:56,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:56,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:56,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:56,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:56,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:56,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:17:56,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:56,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:57,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:57,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 21:17:57,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:17:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:17:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:17:57,102 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-23 21:17:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:57,728 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-23 21:17:57,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:17:57,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-23 21:17:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:57,734 INFO L225 Difference]: With dead ends: 164 [2018-09-23 21:17:57,734 INFO L226 Difference]: Without dead ends: 162 [2018-09-23 21:17:57,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:17:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-23 21:17:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-23 21:17:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:17:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-23 21:17:57,758 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-23 21:17:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:57,758 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-23 21:17:57,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:17:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-23 21:17:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:17:57,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:57,760 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:57,761 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:57,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-23 21:17:57,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:57,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:57,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:57,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:57,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:57,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:57,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:17:57,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:57,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:58,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:58,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 21:17:58,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:17:58,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:17:58,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:17:58,051 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-23 21:17:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:59,041 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-23 21:17:59,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:17:59,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-23 21:17:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:59,044 INFO L225 Difference]: With dead ends: 181 [2018-09-23 21:17:59,044 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 21:17:59,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:17:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 21:17:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-23 21:17:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 21:17:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-23 21:17:59,072 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-23 21:17:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:59,073 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-23 21:17:59,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:17:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-23 21:17:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:17:59,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:59,075 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:59,075 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:59,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-23 21:17:59,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:59,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:59,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:59,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:59,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:59,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:59,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:17:59,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:59,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:59,444 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:17:59,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-23 21:17:59,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:17:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:17:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:17:59,448 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-23 21:18:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:00,667 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-23 21:18:00,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:18:00,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-23 21:18:00,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:00,670 INFO L225 Difference]: With dead ends: 217 [2018-09-23 21:18:00,670 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 21:18:00,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:18:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 21:18:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-23 21:18:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:18:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-23 21:18:00,693 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-23 21:18:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:00,693 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-23 21:18:00,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:18:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-23 21:18:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:00,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:00,695 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:00,695 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:00,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:00,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-23 21:18:00,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:00,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:00,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:00,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:00,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:00,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:00,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:00,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:00,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:01,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:01,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 21:18:01,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:01,089 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-23 21:18:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:02,841 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-23 21:18:02,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:18:02,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-23 21:18:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:02,843 INFO L225 Difference]: With dead ends: 194 [2018-09-23 21:18:02,844 INFO L226 Difference]: Without dead ends: 192 [2018-09-23 21:18:02,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:18:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-23 21:18:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-23 21:18:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 21:18:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-23 21:18:02,885 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-23 21:18:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:02,885 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-23 21:18:02,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-23 21:18:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:02,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:02,887 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:02,887 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:02,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-23 21:18:02,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:02,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:02,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:02,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:02,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:03,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:03,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:03,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:03,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:03,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:03,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 21:18:03,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:18:03,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:18:03,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:18:03,478 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-23 21:18:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:04,798 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-23 21:18:04,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:18:04,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:18:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:04,804 INFO L225 Difference]: With dead ends: 246 [2018-09-23 21:18:04,805 INFO L226 Difference]: Without dead ends: 244 [2018-09-23 21:18:04,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:18:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-23 21:18:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-23 21:18:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 21:18:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-23 21:18:04,840 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-23 21:18:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:04,840 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-23 21:18:04,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:18:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-23 21:18:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:04,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:04,841 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:04,842 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:04,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-23 21:18:04,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:04,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:04,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:04,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:04,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:04,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:04,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:04,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:04,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:05,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:05,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 21:18:05,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:18:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:18:05,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:18:05,204 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-23 21:18:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:07,560 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-23 21:18:07,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:18:07,564 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:18:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:07,568 INFO L225 Difference]: With dead ends: 288 [2018-09-23 21:18:07,569 INFO L226 Difference]: Without dead ends: 286 [2018-09-23 21:18:07,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:18:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-23 21:18:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-23 21:18:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 21:18:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-23 21:18:07,600 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-23 21:18:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:07,601 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-23 21:18:07,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:18:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-23 21:18:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:07,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:07,602 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:07,602 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:07,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-23 21:18:07,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:07,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:07,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:07,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:07,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:07,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:07,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:07,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:07,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:07,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:07,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 21:18:07,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:18:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:18:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:18:07,888 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-23 21:18:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:08,803 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-23 21:18:08,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:08,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:18:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:08,808 INFO L225 Difference]: With dead ends: 314 [2018-09-23 21:18:08,808 INFO L226 Difference]: Without dead ends: 312 [2018-09-23 21:18:08,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:18:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-23 21:18:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-23 21:18:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-23 21:18:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-23 21:18:08,846 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-23 21:18:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:08,847 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-23 21:18:08,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:18:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-23 21:18:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:08,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:08,848 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:08,848 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:08,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-23 21:18:08,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:08,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:08,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:08,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:08,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:08,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:08,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:08,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:08,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:09,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:09,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 21:18:09,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:09,141 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-23 21:18:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:09,998 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-23 21:18:09,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:18:09,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-23 21:18:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:10,001 INFO L225 Difference]: With dead ends: 322 [2018-09-23 21:18:10,001 INFO L226 Difference]: Without dead ends: 320 [2018-09-23 21:18:10,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:18:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-23 21:18:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-23 21:18:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-23 21:18:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-23 21:18:10,062 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-23 21:18:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:10,063 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-23 21:18:10,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-23 21:18:10,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:10,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:10,068 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:10,068 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:10,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-23 21:18:10,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:10,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:10,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:10,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:10,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:10,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:10,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:10,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:10,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:10,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:10,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 21:18:10,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:18:10,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:18:10,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:18:10,566 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-23 21:18:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:11,978 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-23 21:18:11,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:11,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:18:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:11,986 INFO L225 Difference]: With dead ends: 378 [2018-09-23 21:18:11,986 INFO L226 Difference]: Without dead ends: 376 [2018-09-23 21:18:11,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:18:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-23 21:18:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-23 21:18:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-23 21:18:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-23 21:18:12,063 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-23 21:18:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:12,063 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-23 21:18:12,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:18:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-23 21:18:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:12,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:12,064 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:12,065 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:12,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-23 21:18:12,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:12,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:12,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:12,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:12,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:12,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:12,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:12,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:12,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:12,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:12,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2018-09-23 21:18:12,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:18:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:18:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:18:12,452 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 15 states. [2018-09-23 21:18:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:14,042 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-23 21:18:14,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:18:14,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 21:18:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:14,046 INFO L225 Difference]: With dead ends: 395 [2018-09-23 21:18:14,046 INFO L226 Difference]: Without dead ends: 393 [2018-09-23 21:18:14,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:18:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-23 21:18:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-23 21:18:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-23 21:18:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-23 21:18:14,109 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-23 21:18:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:14,110 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-23 21:18:14,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:18:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-23 21:18:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:14,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:14,111 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:14,111 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:14,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-23 21:18:14,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:14,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:14,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:14,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:14,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:14,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:14,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:14,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:14,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:14,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:14,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-23 21:18:14,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:14,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:14,418 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 13 states. [2018-09-23 21:18:15,546 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-23 21:18:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:17,091 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-23 21:18:17,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:18:17,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-23 21:18:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:17,094 INFO L225 Difference]: With dead ends: 383 [2018-09-23 21:18:17,094 INFO L226 Difference]: Without dead ends: 381 [2018-09-23 21:18:17,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:18:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-23 21:18:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-23 21:18:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-23 21:18:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-23 21:18:17,170 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-23 21:18:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:17,170 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-23 21:18:17,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-23 21:18:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:18:17,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:17,171 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:17,172 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:17,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-23 21:18:17,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:17,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:17,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:17,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:17,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:17,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:17,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:17,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:17,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 21:18:17,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:18:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:18:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:18:17,819 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-23 21:18:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:19,343 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-23 21:18:19,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:18:19,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-23 21:18:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:19,346 INFO L225 Difference]: With dead ends: 429 [2018-09-23 21:18:19,347 INFO L226 Difference]: Without dead ends: 427 [2018-09-23 21:18:19,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:18:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-23 21:18:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-23 21:18:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-23 21:18:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-23 21:18:19,423 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-23 21:18:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:19,423 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-23 21:18:19,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:18:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-23 21:18:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:18:19,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:19,424 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:19,425 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:19,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-23 21:18:19,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:19,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:19,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:19,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:20,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:20,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:20,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 21:18:20,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:18:20,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:18:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:18:20,693 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-23 21:18:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:22,251 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-23 21:18:22,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:18:22,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-23 21:18:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:22,253 INFO L225 Difference]: With dead ends: 330 [2018-09-23 21:18:22,254 INFO L226 Difference]: Without dead ends: 328 [2018-09-23 21:18:22,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:18:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-23 21:18:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-23 21:18:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 21:18:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-23 21:18:22,309 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-23 21:18:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:22,309 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-23 21:18:22,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:18:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-23 21:18:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:22,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:22,310 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:22,311 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:22,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-23 21:18:22,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:22,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:22,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:22,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:22,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:22,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:22,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:22,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:22,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:22,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-23 21:18:22,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:18:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:18:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:18:22,599 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 12 states. [2018-09-23 21:18:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:23,140 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-23 21:18:23,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:18:23,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-23 21:18:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:23,141 INFO L225 Difference]: With dead ends: 271 [2018-09-23 21:18:23,142 INFO L226 Difference]: Without dead ends: 269 [2018-09-23 21:18:23,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:18:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-23 21:18:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-23 21:18:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-23 21:18:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-23 21:18:23,201 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-23 21:18:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:23,201 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-23 21:18:23,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:18:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-23 21:18:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:23,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:23,203 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:23,203 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:23,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-23 21:18:23,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:23,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:23,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:23,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:23,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:23,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:23,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:23,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:23,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:23,475 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:18:23,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-23 21:18:23,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:23,476 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-23 21:18:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:26,108 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-23 21:18:26,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:18:26,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:26,112 INFO L225 Difference]: With dead ends: 741 [2018-09-23 21:18:26,112 INFO L226 Difference]: Without dead ends: 564 [2018-09-23 21:18:26,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:18:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-23 21:18:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-23 21:18:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-23 21:18:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-23 21:18:26,283 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-23 21:18:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:26,283 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-23 21:18:26,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-23 21:18:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:26,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:26,285 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:26,285 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:26,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-23 21:18:26,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:26,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:26,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:26,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:26,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:26,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:26,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:26,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:26,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 21:18:26,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:26,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:26,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:26,616 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-23 21:18:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:28,373 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-23 21:18:28,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:18:28,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:28,377 INFO L225 Difference]: With dead ends: 809 [2018-09-23 21:18:28,377 INFO L226 Difference]: Without dead ends: 470 [2018-09-23 21:18:28,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:18:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-23 21:18:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-23 21:18:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-23 21:18:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-23 21:18:28,532 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-23 21:18:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:28,532 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-23 21:18:28,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-23 21:18:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:28,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:28,534 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:28,534 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:28,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:28,534 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-23 21:18:28,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:28,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:28,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:28,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:29,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:29,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:29,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:29,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:29,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:29,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 21:18:29,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:29,172 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-23 21:18:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:31,067 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-23 21:18:31,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:18:31,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:31,072 INFO L225 Difference]: With dead ends: 1106 [2018-09-23 21:18:31,072 INFO L226 Difference]: Without dead ends: 724 [2018-09-23 21:18:31,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:18:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-23 21:18:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-23 21:18:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-23 21:18:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-23 21:18:31,239 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-23 21:18:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:31,239 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-23 21:18:31,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-23 21:18:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:31,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:31,240 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:31,240 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:31,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-23 21:18:31,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:31,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:31,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:31,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:31,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:31,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:31,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:31,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:31,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-23 21:18:31,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:18:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:18:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:18:31,501 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-23 21:18:32,326 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-23 21:18:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:33,065 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-23 21:18:33,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:33,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-23 21:18:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:33,070 INFO L225 Difference]: With dead ends: 711 [2018-09-23 21:18:33,070 INFO L226 Difference]: Without dead ends: 709 [2018-09-23 21:18:33,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:18:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-23 21:18:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-23 21:18:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-23 21:18:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-23 21:18:33,241 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-23 21:18:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:33,241 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-23 21:18:33,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:18:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-23 21:18:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:33,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:33,243 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:33,243 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:33,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-23 21:18:33,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:33,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:33,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:33,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:33,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:33,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:33,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:33,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:33,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:33,553 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:18:33,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-23 21:18:33,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:33,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:33,554 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-23 21:18:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:35,406 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-23 21:18:35,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:18:35,406 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:35,410 INFO L225 Difference]: With dead ends: 1319 [2018-09-23 21:18:35,410 INFO L226 Difference]: Without dead ends: 823 [2018-09-23 21:18:35,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:18:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-23 21:18:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-23 21:18:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-23 21:18:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-23 21:18:35,638 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-23 21:18:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:35,638 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-23 21:18:35,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-23 21:18:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:35,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:35,639 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:35,639 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:35,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-23 21:18:35,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:35,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:35,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:35,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:35,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:35,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:35,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:35,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:35,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:36,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:36,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-23 21:18:36,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:18:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:18:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:18:36,207 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 12 states. [2018-09-23 21:18:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:37,035 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-23 21:18:37,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:18:37,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-23 21:18:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:37,039 INFO L225 Difference]: With dead ends: 766 [2018-09-23 21:18:37,039 INFO L226 Difference]: Without dead ends: 764 [2018-09-23 21:18:37,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:18:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-23 21:18:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-23 21:18:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-23 21:18:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-23 21:18:37,243 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-23 21:18:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:37,243 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-23 21:18:37,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:18:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-23 21:18:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:37,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:37,244 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:37,244 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:37,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-23 21:18:37,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:37,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:37,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:37,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:37,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:37,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:37,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:37,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:37,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:37,772 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:18:37,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-23 21:18:37,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:37,773 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-23 21:18:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:40,625 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-23 21:18:40,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:18:40,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:40,632 INFO L225 Difference]: With dead ends: 2095 [2018-09-23 21:18:40,632 INFO L226 Difference]: Without dead ends: 1329 [2018-09-23 21:18:40,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:18:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-23 21:18:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-23 21:18:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-23 21:18:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-23 21:18:40,967 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-23 21:18:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:40,967 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-23 21:18:40,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-23 21:18:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:40,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:40,968 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:40,969 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:40,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-23 21:18:40,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:40,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:40,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:40,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:40,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:41,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:41,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:41,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:41,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:41,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:41,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-23 21:18:41,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:18:41,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:18:41,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:18:41,352 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-23 21:18:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:42,626 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-23 21:18:42,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:42,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-23 21:18:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:42,631 INFO L225 Difference]: With dead ends: 1291 [2018-09-23 21:18:42,631 INFO L226 Difference]: Without dead ends: 1289 [2018-09-23 21:18:42,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:18:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-23 21:18:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-23 21:18:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-23 21:18:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-23 21:18:42,950 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-23 21:18:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:42,951 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-23 21:18:42,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:18:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-23 21:18:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:42,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:42,952 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:42,952 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:42,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-23 21:18:42,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:42,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:42,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:42,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:42,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:43,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:43,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:43,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:43,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:43,182 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 21:18:43,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-23 21:18:43,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:43,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:43,183 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-23 21:18:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:44,750 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-23 21:18:44,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:18:44,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:44,755 INFO L225 Difference]: With dead ends: 2222 [2018-09-23 21:18:44,755 INFO L226 Difference]: Without dead ends: 1132 [2018-09-23 21:18:44,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:18:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-23 21:18:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-23 21:18:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-23 21:18:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-23 21:18:45,067 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-23 21:18:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:45,067 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-23 21:18:45,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-23 21:18:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:45,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:45,069 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:45,069 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:45,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-23 21:18:45,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:45,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:45,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:45,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:45,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:45,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:45,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:45,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:45,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:45,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:45,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 21:18:45,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:45,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:45,308 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-23 21:18:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:47,557 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-23 21:18:47,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:18:47,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 21:18:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:47,562 INFO L225 Difference]: With dead ends: 1989 [2018-09-23 21:18:47,562 INFO L226 Difference]: Without dead ends: 1130 [2018-09-23 21:18:47,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:18:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-23 21:18:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-23 21:18:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-23 21:18:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-23 21:18:47,850 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-23 21:18:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-23 21:18:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-23 21:18:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:47,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:47,853 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:47,853 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:47,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-23 21:18:47,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:47,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:47,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:47,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:47,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:48,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:48,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:48,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:48,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:48,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:48,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 21:18:48,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:18:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:18:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:18:48,434 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-23 21:18:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:49,705 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-23 21:18:49,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:18:49,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-23 21:18:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:49,710 INFO L225 Difference]: With dead ends: 1022 [2018-09-23 21:18:49,710 INFO L226 Difference]: Without dead ends: 1020 [2018-09-23 21:18:49,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:18:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-23 21:18:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-23 21:18:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-23 21:18:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-23 21:18:50,006 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-23 21:18:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:50,006 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-23 21:18:50,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:18:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-23 21:18:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:50,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:50,008 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:50,008 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:50,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-23 21:18:50,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:50,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:50,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:50,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:50,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:50,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:50,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:50,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:50,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:50,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:50,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-23 21:18:50,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:18:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:18:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:18:50,560 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-23 21:18:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:52,432 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-23 21:18:52,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:52,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-23 21:18:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:52,436 INFO L225 Difference]: With dead ends: 1127 [2018-09-23 21:18:52,436 INFO L226 Difference]: Without dead ends: 1125 [2018-09-23 21:18:52,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:18:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-23 21:18:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-23 21:18:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-23 21:18:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-23 21:18:52,710 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-23 21:18:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:52,711 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-23 21:18:52,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:18:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-23 21:18:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:52,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:52,713 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:52,713 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:52,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-23 21:18:52,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:52,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:52,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:52,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:52,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:52,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:52,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:52,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:52,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:52,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:52,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 21:18:52,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:18:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:18:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:18:52,943 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-23 21:18:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:54,577 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-23 21:18:54,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:18:54,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-23 21:18:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:54,582 INFO L225 Difference]: With dead ends: 1127 [2018-09-23 21:18:54,582 INFO L226 Difference]: Without dead ends: 1125 [2018-09-23 21:18:54,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:18:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-23 21:18:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-23 21:18:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-23 21:18:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-23 21:18:54,854 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-23 21:18:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:54,854 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-23 21:18:54,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:18:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-23 21:18:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:54,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:54,856 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:54,856 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:54,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-23 21:18:54,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:54,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:54,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:54,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:54,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:55,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:55,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:55,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:55,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:55,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:55,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-23 21:18:55,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:18:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:18:55,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:18:55,386 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-23 21:18:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:57,019 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-23 21:18:57,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:18:57,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-23 21:18:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:57,023 INFO L225 Difference]: With dead ends: 1072 [2018-09-23 21:18:57,023 INFO L226 Difference]: Without dead ends: 1070 [2018-09-23 21:18:57,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:18:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-23 21:18:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-23 21:18:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-23 21:18:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-23 21:18:57,450 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-23 21:18:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:57,450 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-23 21:18:57,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:18:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-23 21:18:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:57,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:57,452 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:57,452 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:57,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-23 21:18:57,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:57,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:57,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:57,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:57,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:57,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:57,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:57,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:57,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:57,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:57,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-23 21:18:57,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:18:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:18:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:18:57,789 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 10 states. [2018-09-23 21:18:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:59,110 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-23 21:18:59,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:59,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-23 21:18:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:59,114 INFO L225 Difference]: With dead ends: 1025 [2018-09-23 21:18:59,114 INFO L226 Difference]: Without dead ends: 1023 [2018-09-23 21:18:59,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:18:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-23 21:18:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-23 21:18:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-23 21:18:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-23 21:18:59,419 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-23 21:18:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:59,420 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-23 21:18:59,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:18:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-23 21:18:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:59,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:59,421 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:18:59,422 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:59,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-23 21:18:59,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:59,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:59,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:59,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:59,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:59,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:59,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:59,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:59,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-23 21:18:59,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:18:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:18:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:18:59,714 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-23 21:19:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:01,350 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-23 21:19:01,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:19:01,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-23 21:19:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:01,354 INFO L225 Difference]: With dead ends: 1057 [2018-09-23 21:19:01,354 INFO L226 Difference]: Without dead ends: 1055 [2018-09-23 21:19:01,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:19:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-23 21:19:01,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-23 21:19:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-23 21:19:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-23 21:19:01,660 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-23 21:19:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:01,660 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-23 21:19:01,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:19:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-23 21:19:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:19:01,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:01,661 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:01,661 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:01,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-23 21:19:01,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:01,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:01,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:01,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:01,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:02,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:02,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:02,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:02,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:19:02,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:02,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 21:19:02,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:19:02,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:19:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:19:02,493 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-23 21:19:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:05,091 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-23 21:19:05,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:19:05,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 21:19:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:05,097 INFO L225 Difference]: With dead ends: 1779 [2018-09-23 21:19:05,097 INFO L226 Difference]: Without dead ends: 1507 [2018-09-23 21:19:05,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=3655, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:19:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-23 21:19:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-23 21:19:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-23 21:19:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-23 21:19:05,567 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-23 21:19:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:05,567 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-23 21:19:05,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:19:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-23 21:19:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:19:05,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:05,569 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:05,569 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:05,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-23 21:19:05,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:05,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:05,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:05,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:05,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:05,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:05,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:19:05,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:05,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 21:19:05,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:19:05,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:19:05,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:19:05,898 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-23 21:19:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:08,856 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-23 21:19:08,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:19:08,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 21:19:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:08,862 INFO L225 Difference]: With dead ends: 2685 [2018-09-23 21:19:08,862 INFO L226 Difference]: Without dead ends: 1652 [2018-09-23 21:19:08,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:19:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-23 21:19:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-23 21:19:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-23 21:19:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-23 21:19:09,315 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-23 21:19:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:09,315 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-23 21:19:09,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:19:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-23 21:19:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:19:09,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:09,317 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:09,317 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:09,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-23 21:19:09,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:09,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:09,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:09,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:09,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:09,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:09,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:09,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:09,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:19:09,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:09,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 21:19:09,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:19:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:19:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:19:09,617 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-23 21:19:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:12,384 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-23 21:19:12,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:19:12,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 21:19:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:12,392 INFO L225 Difference]: With dead ends: 2130 [2018-09-23 21:19:12,392 INFO L226 Difference]: Without dead ends: 1946 [2018-09-23 21:19:12,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1010, Invalid=3546, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:19:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-23 21:19:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-23 21:19:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-23 21:19:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-23 21:19:13,083 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-23 21:19:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:13,083 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-23 21:19:13,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:19:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-23 21:19:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:19:13,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:13,085 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:13,085 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:13,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-23 21:19:13,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:13,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:13,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:13,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:13,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:13,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:13,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:13,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:13,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:19:13,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:13,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 21:19:13,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:19:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:19:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:19:13,500 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-23 21:19:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:16,426 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-23 21:19:16,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:19:16,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 21:19:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:16,436 INFO L225 Difference]: With dead ends: 3372 [2018-09-23 21:19:16,436 INFO L226 Difference]: Without dead ends: 2040 [2018-09-23 21:19:16,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:19:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-23 21:19:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-23 21:19:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-23 21:19:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-23 21:19:17,032 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-23 21:19:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:17,032 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-23 21:19:17,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:19:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-23 21:19:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:19:17,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:17,035 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:17,035 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:17,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-23 21:19:17,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:17,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:17,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:17,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:17,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:17,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:17,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:17,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:17,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:17,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:17,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:17,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:17,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 21:19:17,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:19:17,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:19:17,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:19:17,474 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-23 21:19:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:24,536 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-23 21:19:24,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:19:24,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-23 21:19:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:24,546 INFO L225 Difference]: With dead ends: 2646 [2018-09-23 21:19:24,546 INFO L226 Difference]: Without dead ends: 2644 [2018-09-23 21:19:24,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3132, Invalid=9524, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:19:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-23 21:19:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-23 21:19:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-23 21:19:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-23 21:19:25,259 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-23 21:19:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:25,260 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-23 21:19:25,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:19:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-23 21:19:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:19:25,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:25,262 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:25,262 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:25,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-23 21:19:25,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:25,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:25,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:25,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:25,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:25,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:25,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:25,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:25,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:25,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:25,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:25,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-23 21:19:25,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:19:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:19:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:19:25,708 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. [2018-09-23 21:19:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:32,818 INFO L93 Difference]: Finished difference Result 2887 states and 4117 transitions. [2018-09-23 21:19:32,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:19:32,819 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-09-23 21:19:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:32,828 INFO L225 Difference]: With dead ends: 2887 [2018-09-23 21:19:32,828 INFO L226 Difference]: Without dead ends: 2885 [2018-09-23 21:19:32,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3166, Invalid=9716, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:19:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-09-23 21:19:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2102. [2018-09-23 21:19:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2018-09-23 21:19:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2970 transitions. [2018-09-23 21:19:33,638 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2970 transitions. Word has length 29 [2018-09-23 21:19:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:33,639 INFO L480 AbstractCegarLoop]: Abstraction has 2102 states and 2970 transitions. [2018-09-23 21:19:33,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:19:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2970 transitions. [2018-09-23 21:19:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:19:33,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:33,641 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:33,642 INFO L423 AbstractCegarLoop]: === Iteration 41 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:33,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1174012687, now seen corresponding path program 2 times [2018-09-23 21:19:33,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:33,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:33,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:33,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:33,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 21:19:33,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:33,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:33,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:33,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:33,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:33,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:19:34,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:34,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-23 21:19:34,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:19:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:19:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:19:34,313 INFO L87 Difference]: Start difference. First operand 2102 states and 2970 transitions. Second operand 16 states. [2018-09-23 21:19:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:39,920 INFO L93 Difference]: Finished difference Result 6948 states and 9725 transitions. [2018-09-23 21:19:39,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-23 21:19:39,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-23 21:19:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:39,933 INFO L225 Difference]: With dead ends: 6948 [2018-09-23 21:19:39,933 INFO L226 Difference]: Without dead ends: 4896 [2018-09-23 21:19:39,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 21:19:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2018-09-23 21:19:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 3634. [2018-09-23 21:19:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2018-09-23 21:19:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5080 transitions. [2018-09-23 21:19:41,429 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5080 transitions. Word has length 33 [2018-09-23 21:19:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:41,429 INFO L480 AbstractCegarLoop]: Abstraction has 3634 states and 5080 transitions. [2018-09-23 21:19:41,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:19:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5080 transitions. [2018-09-23 21:19:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:19:41,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:41,433 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:41,433 INFO L423 AbstractCegarLoop]: === Iteration 42 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:41,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2110003385, now seen corresponding path program 1 times [2018-09-23 21:19:41,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:41,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:41,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:41,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:41,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:41,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:41,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 21:19:41,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:41,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-23 21:19:41,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:19:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:19:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:19:41,837 INFO L87 Difference]: Start difference. First operand 3634 states and 5080 transitions. Second operand 18 states. [2018-09-23 21:19:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:48,780 INFO L93 Difference]: Finished difference Result 5436 states and 7576 transitions. [2018-09-23 21:19:48,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:19:48,780 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-23 21:19:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:48,792 INFO L225 Difference]: With dead ends: 5436 [2018-09-23 21:19:48,793 INFO L226 Difference]: Without dead ends: 5349 [2018-09-23 21:19:48,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1401, Invalid=6609, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:19:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2018-09-23 21:19:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4022. [2018-09-23 21:19:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2018-09-23 21:19:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5648 transitions. [2018-09-23 21:19:50,526 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5648 transitions. Word has length 33 [2018-09-23 21:19:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:50,527 INFO L480 AbstractCegarLoop]: Abstraction has 4022 states and 5648 transitions. [2018-09-23 21:19:50,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:19:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5648 transitions. [2018-09-23 21:19:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:19:50,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:50,530 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:19:50,530 INFO L423 AbstractCegarLoop]: === Iteration 43 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:50,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:50,531 INFO L82 PathProgramCache]: Analyzing trace with hash -895180230, now seen corresponding path program 3 times [2018-09-23 21:19:50,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:50,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:50,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:50,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:50,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:51,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:51,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:51,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:51,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:19:51,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:51,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 21:19:51,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:51,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-23 21:19:51,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:19:51,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:19:51,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:19:51,920 INFO L87 Difference]: Start difference. First operand 4022 states and 5648 transitions. Second operand 22 states. [2018-09-23 21:20:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:04,021 INFO L93 Difference]: Finished difference Result 8032 states and 11417 transitions. [2018-09-23 21:20:04,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-23 21:20:04,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2018-09-23 21:20:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:04,037 INFO L225 Difference]: With dead ends: 8032 [2018-09-23 21:20:04,038 INFO L226 Difference]: Without dead ends: 7935 [2018-09-23 21:20:04,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8181 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4070, Invalid=17686, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 21:20:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2018-09-23 21:20:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 4327. [2018-09-23 21:20:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2018-09-23 21:20:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 6121 transitions. [2018-09-23 21:20:05,994 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 6121 transitions. Word has length 33 [2018-09-23 21:20:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:05,994 INFO L480 AbstractCegarLoop]: Abstraction has 4327 states and 6121 transitions. [2018-09-23 21:20:05,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:20:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 6121 transitions. [2018-09-23 21:20:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:20:05,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:05,998 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:20:05,998 INFO L423 AbstractCegarLoop]: === Iteration 44 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:05,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1250173630, now seen corresponding path program 1 times [2018-09-23 21:20:05,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:05,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:05,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:05,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:05,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:20:06,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:06,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:06,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:06,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:20:06,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:06,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-23 21:20:06,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:20:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:20:06,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:20:06,576 INFO L87 Difference]: Start difference. First operand 4327 states and 6121 transitions. Second operand 19 states. [2018-09-23 21:20:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:14,932 INFO L93 Difference]: Finished difference Result 9177 states and 12958 transitions. [2018-09-23 21:20:14,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:20:14,932 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-23 21:20:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:14,947 INFO L225 Difference]: With dead ends: 9177 [2018-09-23 21:20:14,947 INFO L226 Difference]: Without dead ends: 5991 [2018-09-23 21:20:14,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4514 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2969, Invalid=11311, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 21:20:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2018-09-23 21:20:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 4147. [2018-09-23 21:20:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4147 states. [2018-09-23 21:20:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 5817 transitions. [2018-09-23 21:20:16,972 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 5817 transitions. Word has length 33 [2018-09-23 21:20:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:16,973 INFO L480 AbstractCegarLoop]: Abstraction has 4147 states and 5817 transitions. [2018-09-23 21:20:16,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:20:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 5817 transitions. [2018-09-23 21:20:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:20:16,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:16,977 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:20:16,977 INFO L423 AbstractCegarLoop]: === Iteration 45 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:16,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1810158453, now seen corresponding path program 2 times [2018-09-23 21:20:16,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:16,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:16,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:16,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:16,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:17,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:17,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:17,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:17,307 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:17,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:17,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:17,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:17,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-09-23 21:20:17,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:20:17,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:20:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:20:17,467 INFO L87 Difference]: Start difference. First operand 4147 states and 5817 transitions. Second operand 18 states. [2018-09-23 21:20:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:22,933 INFO L93 Difference]: Finished difference Result 5255 states and 7327 transitions. [2018-09-23 21:20:22,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:20:22,933 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-23 21:20:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:22,942 INFO L225 Difference]: With dead ends: 5255 [2018-09-23 21:20:22,942 INFO L226 Difference]: Without dead ends: 5253 [2018-09-23 21:20:22,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:20:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2018-09-23 21:20:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4447. [2018-09-23 21:20:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2018-09-23 21:20:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6228 transitions. [2018-09-23 21:20:25,194 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6228 transitions. Word has length 33 [2018-09-23 21:20:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:25,195 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 6228 transitions. [2018-09-23 21:20:25,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:20:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6228 transitions. [2018-09-23 21:20:25,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:20:25,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:25,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:20:25,199 INFO L423 AbstractCegarLoop]: === Iteration 46 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:25,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:25,199 INFO L82 PathProgramCache]: Analyzing trace with hash -667748710, now seen corresponding path program 1 times [2018-09-23 21:20:25,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:25,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:25,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:25,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:25,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:25,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:25,422 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 [2018-09-23 21:20:25,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:25,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 21:20:25,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:25,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-23 21:20:25,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:20:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:20:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:20:25,658 INFO L87 Difference]: Start difference. First operand 4447 states and 6228 transitions. Second operand 18 states. [2018-09-23 21:20:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:36,023 INFO L93 Difference]: Finished difference Result 7721 states and 10805 transitions. [2018-09-23 21:20:36,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:20:36,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-23 21:20:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:36,033 INFO L225 Difference]: With dead ends: 7721 [2018-09-23 21:20:36,034 INFO L226 Difference]: Without dead ends: 7719 [2018-09-23 21:20:36,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1278, Invalid=8228, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:20:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-09-23 21:20:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 5438. [2018-09-23 21:20:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2018-09-23 21:20:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 7651 transitions. [2018-09-23 21:20:38,557 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 7651 transitions. Word has length 33 [2018-09-23 21:20:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:38,558 INFO L480 AbstractCegarLoop]: Abstraction has 5438 states and 7651 transitions. [2018-09-23 21:20:38,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:20:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 7651 transitions. [2018-09-23 21:20:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:20:38,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:38,562 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:20:38,562 INFO L423 AbstractCegarLoop]: === Iteration 47 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:38,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1146614399, now seen corresponding path program 2 times [2018-09-23 21:20:38,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:38,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:38,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:38,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:38,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 21:20:38,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:38,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:38,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:38,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:38,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:38,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:20:38,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:38,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-23 21:20:38,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:20:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:20:38,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:20:38,872 INFO L87 Difference]: Start difference. First operand 5438 states and 7651 transitions. Second operand 16 states. [2018-09-23 21:20:42,667 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-23 21:20:43,089 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-23 21:20:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:48,478 INFO L93 Difference]: Finished difference Result 15976 states and 22278 transitions. [2018-09-23 21:20:48,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-23 21:20:48,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-23 21:20:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:48,491 INFO L225 Difference]: With dead ends: 15976 [2018-09-23 21:20:48,492 INFO L226 Difference]: Without dead ends: 10483 [2018-09-23 21:20:48,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 21:20:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2018-09-23 21:20:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8111. [2018-09-23 21:20:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2018-09-23 21:20:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11260 transitions. [2018-09-23 21:20:52,197 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11260 transitions. Word has length 33 [2018-09-23 21:20:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:52,197 INFO L480 AbstractCegarLoop]: Abstraction has 8111 states and 11260 transitions. [2018-09-23 21:20:52,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:20:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11260 transitions. [2018-09-23 21:20:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:20:52,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:52,201 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:20:52,201 INFO L423 AbstractCegarLoop]: === Iteration 48 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:52,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1449531796, now seen corresponding path program 1 times [2018-09-23 21:20:52,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:52,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:52,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:52,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:52,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:52,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:52,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 21:20:52,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:52,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-09-23 21:20:52,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:20:52,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:20:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:20:52,648 INFO L87 Difference]: Start difference. First operand 8111 states and 11260 transitions. Second operand 19 states. [2018-09-23 21:20:53,657 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-23 21:21:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:01,729 INFO L93 Difference]: Finished difference Result 10277 states and 14246 transitions. [2018-09-23 21:21:01,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:21:01,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-23 21:21:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:01,742 INFO L225 Difference]: With dead ends: 10277 [2018-09-23 21:21:01,743 INFO L226 Difference]: Without dead ends: 10275 [2018-09-23 21:21:01,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=978, Invalid=4424, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:21:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2018-09-23 21:21:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 8291. [2018-09-23 21:21:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8291 states. [2018-09-23 21:21:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 11531 transitions. [2018-09-23 21:21:05,661 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 11531 transitions. Word has length 33 [2018-09-23 21:21:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:05,662 INFO L480 AbstractCegarLoop]: Abstraction has 8291 states and 11531 transitions. [2018-09-23 21:21:05,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:21:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 11531 transitions. [2018-09-23 21:21:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:21:05,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:05,667 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:05,667 INFO L423 AbstractCegarLoop]: === Iteration 49 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:05,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1026480992, now seen corresponding path program 1 times [2018-09-23 21:21:05,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:05,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:05,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:05,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:05,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:21:05,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:05,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:05,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:05,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:21:06,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:06,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-23 21:21:06,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:21:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:21:06,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:21:06,026 INFO L87 Difference]: Start difference. First operand 8291 states and 11531 transitions. Second operand 19 states. [2018-09-23 21:21:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:16,404 INFO L93 Difference]: Finished difference Result 16294 states and 22694 transitions. [2018-09-23 21:21:16,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:21:16,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-23 21:21:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:16,418 INFO L225 Difference]: With dead ends: 16294 [2018-09-23 21:21:16,418 INFO L226 Difference]: Without dead ends: 9999 [2018-09-23 21:21:16,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4530 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2859, Invalid=11183, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 21:21:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9999 states. [2018-09-23 21:21:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9999 to 8241. [2018-09-23 21:21:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-09-23 21:21:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11466 transitions. [2018-09-23 21:21:20,708 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11466 transitions. Word has length 33 [2018-09-23 21:21:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:20,708 INFO L480 AbstractCegarLoop]: Abstraction has 8241 states and 11466 transitions. [2018-09-23 21:21:20,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:21:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11466 transitions. [2018-09-23 21:21:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:21:20,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:20,713 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:20,713 INFO L423 AbstractCegarLoop]: === Iteration 50 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:20,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash 610357864, now seen corresponding path program 3 times [2018-09-23 21:21:20,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:20,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:20,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:20,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:20,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:21,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:21,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:21,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:21,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:21:21,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:21,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:21:21,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:21,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2018-09-23 21:21:21,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:21:21,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:21:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:21:21,548 INFO L87 Difference]: Start difference. First operand 8241 states and 11466 transitions. Second operand 21 states. [2018-09-23 21:21:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,832 INFO L93 Difference]: Finished difference Result 25684 states and 35500 transitions. [2018-09-23 21:21:41,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-09-23 21:21:41,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-23 21:21:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,852 INFO L225 Difference]: With dead ends: 25684 [2018-09-23 21:21:41,853 INFO L226 Difference]: Without dead ends: 16698 [2018-09-23 21:21:41,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18096 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6678, Invalid=35142, Unknown=0, NotChecked=0, Total=41820 [2018-09-23 21:21:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2018-09-23 21:21:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10011. [2018-09-23 21:21:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10011 states. [2018-09-23 21:21:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 13930 transitions. [2018-09-23 21:21:46,886 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 13930 transitions. Word has length 33 [2018-09-23 21:21:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:46,886 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 13930 transitions. [2018-09-23 21:21:46,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:21:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 13930 transitions. [2018-09-23 21:21:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:21:46,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:46,891 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:46,891 INFO L423 AbstractCegarLoop]: === Iteration 51 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:46,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash 690693469, now seen corresponding path program 1 times [2018-09-23 21:21:46,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:46,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:46,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:46,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:47,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:47,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:47,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:47,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 21:21:47,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:47,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-09-23 21:21:47,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:21:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:21:47,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:21:47,580 INFO L87 Difference]: Start difference. First operand 10011 states and 13930 transitions. Second operand 21 states. [2018-09-23 21:21:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:59,707 INFO L93 Difference]: Finished difference Result 12668 states and 17557 transitions. [2018-09-23 21:21:59,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:21:59,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-23 21:21:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:59,725 INFO L225 Difference]: With dead ends: 12668 [2018-09-23 21:21:59,725 INFO L226 Difference]: Without dead ends: 12586 [2018-09-23 21:21:59,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=841, Invalid=6131, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:21:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. Received shutdown request... [2018-09-23 21:22:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10468. [2018-09-23 21:22:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2018-09-23 21:22:04,773 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:22:04,779 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:22:04,779 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:22:04 BoogieIcfgContainer [2018-09-23 21:22:04,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:22:04,780 INFO L168 Benchmark]: Toolchain (without parser) took 253498.05 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 1.0 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-23 21:22:04,781 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:22:04,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:22:04,782 INFO L168 Benchmark]: Boogie Preprocessor took 24.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:22:04,782 INFO L168 Benchmark]: RCFGBuilder took 680.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:22:04,783 INFO L168 Benchmark]: TraceAbstraction took 252741.42 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.1 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-23 21:22:04,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.75 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 24.57 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 680.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 252741.42 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.1 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 252.6s OverallTime, 51 OverallIterations, 4 TraceHistogramMax, 186.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3758 SDtfs, 10438 SDslu, 7427 SDs, 0 SdLazy, 52271 SolverSat, 14023 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3857 GetRequests, 1041 SyntacticMatches, 11 SemanticMatches, 2805 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 85743 ImplicationChecksByTransitivity, 74.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10011occurred in iteration=50, 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: 42.5s AutomataMinimizationTime, 51 MinimizatonAttempts, 32101 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 2108 NumberOfCodeBlocks, 2108 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 2009 ConstructedInterpolants, 32 QuantifiedInterpolants, 222893 SizeOfPredicates, 797 NumberOfNonLiveVariables, 14213 ConjunctsInSsa, 1503 ConjunctsInUnsatCore, 99 InterpolantComputations, 9 PerfectInterpolantSequences, 199/778 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_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-22-04-796.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-22-04-796.csv Completed graceful shutdown