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 0.1.23-1cc990c [2018-09-30 23:06:39,079 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:06:39,081 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:06:39,098 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:06:39,099 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:06:39,100 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:06:39,102 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:06:39,104 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:06:39,106 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:06:39,109 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:06:39,111 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:06:39,111 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:06:39,114 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:06:39,116 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:06:39,117 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:06:39,125 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:06:39,126 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:06:39,127 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:06:39,131 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:06:39,133 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:06:39,134 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:06:39,136 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:06:39,139 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:06:39,152 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:06:39,177 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:06:39,177 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:06:39,178 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:06:39,178 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:06:39,179 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:06:39,179 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:06:39,180 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:06:39,180 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:06:39,181 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:06:39,181 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:06:39,181 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:06:39,181 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:06:39,181 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:06:39,181 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:06:39,182 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:06:39,182 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:06:39,182 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:06:39,182 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:06:39,183 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:06:39,184 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:06:39,184 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:06:39,184 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:06:39,184 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:06:39,184 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:06:39,185 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:06:39,185 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:06:39,185 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:06:39,185 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:06:39,185 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:06:39,185 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:06:39,255 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:06:39,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:06:39,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:06:39,275 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:06:39,275 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:06:39,276 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-30 23:06:39,276 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-30 23:06:39,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:06:39,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:06:39,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:06:39,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:06:39,357 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:06:39,378 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 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,391 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 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:06:39,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:06:39,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:06:39,402 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:06:39,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:06:39,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:06:39,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:06:39,442 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:06:39,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:06:39,525 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-30 23:06:39,525 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-30 23:06:39,525 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-30 23:06:39,526 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-30 23:06:39,526 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-30 23:06:39,526 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-30 23:06:39,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:06:39,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:06:39,527 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-30 23:06:39,527 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-30 23:06:40,120 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:06:40,121 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:06:40 BoogieIcfgContainer [2018-09-30 23:06:40,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:06:40,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:06:40,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:06:40,125 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:06:40,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/2) ... [2018-09-30 23:06:40,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574b2686 and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:06:40, skipping insertion in model container [2018-09-30 23:06:40,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:06:40" (2/2) ... [2018-09-30 23:06:40,129 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-30 23:06:40,140 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:06:40,152 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 23:06:40,201 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:06:40,202 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:06:40,202 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:06:40,202 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:06:40,203 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:06:40,203 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:06:40,203 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:06:40,203 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:06:40,203 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:06:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-30 23:06:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:06:40,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:40,248 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:40,250 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:40,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:40,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-30 23:06:40,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:40,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:40,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:40,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:40,512 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:40,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:06:40,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:06:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:06:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:06:40,532 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-30 23:06:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:41,354 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-30 23:06:41,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:06:41,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-30 23:06:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:41,368 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:06:41,368 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:06:41,372 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 [2018-09-30 23:06:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:06:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-30 23:06:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:06:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-30 23:06:41,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-30 23:06:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:41,422 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-30 23:06:41,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:06:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-30 23:06:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:06:41,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:41,424 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:41,425 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:41,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-30 23:06:41,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:41,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:41,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:41,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:41,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:41,561 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:41,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:06:41,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:06:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:06:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:06:41,564 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-30 23:06:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:42,262 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-30 23:06:42,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:06:42,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-30 23:06:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:42,266 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:06:42,267 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:06:42,268 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 [2018-09-30 23:06:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:06:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-30 23:06:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:06:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-30 23:06:42,282 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-30 23:06:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:42,282 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-30 23:06:42,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:06:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-30 23:06:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:42,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:42,285 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:42,286 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:42,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-30 23:06:42,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:42,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:42,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:42,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:42,424 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:42,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 23:06:42,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:06:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:06:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:06:42,426 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-30 23:06:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:43,293 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-30 23:06:43,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:06:43,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 23:06:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:43,301 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:06:43,301 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 23:06:43,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:06:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 23:06:43,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-30 23:06:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:06:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-30 23:06:43,319 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-30 23:06:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:43,320 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-30 23:06:43,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:06:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-30 23:06:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:06:43,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:43,322 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:43,322 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:43,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-30 23:06:43,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:43,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:43,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:43,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:43,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:43,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:43,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:43,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:43,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:43,864 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:06:43,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 23:06:43,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:06:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:06:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:06:43,866 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-30 23:06:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:44,666 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-30 23:06:44,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:06:44,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 23:06:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:44,669 INFO L225 Difference]: With dead ends: 168 [2018-09-30 23:06:44,669 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:06:44,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:06:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:06:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-30 23:06:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:06:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-30 23:06:44,692 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-30 23:06:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:44,692 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-30 23:06:44,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:06:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-30 23:06:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:06:44,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:44,694 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:44,695 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:44,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-30 23:06:44,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:44,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:44,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:44,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:44,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:44,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:44,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:44,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:44,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:45,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:45,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 23:06:45,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:06:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:06:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:06:45,065 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-30 23:06:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:45,747 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-30 23:06:45,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:06:45,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 23:06:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:45,751 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:06:45,752 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 23:06:45,752 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 [2018-09-30 23:06:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 23:06:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-30 23:06:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:06:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-30 23:06:45,790 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-30 23:06:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:45,790 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-30 23:06:45,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:06:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-30 23:06:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:06:45,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:45,795 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:45,796 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:45,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-30 23:06:45,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:45,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:45,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:45,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:45,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:45,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:45,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:45,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:46,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:46,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 23:06:46,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:06:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:06:46,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:06:46,091 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-30 23:06:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:47,025 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-30 23:06:47,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:06:47,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 23:06:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:47,029 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:06:47,030 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:06:47,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:06:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-30 23:06:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:06:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-30 23:06:47,058 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-30 23:06:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:47,059 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-30 23:06:47,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:06:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-30 23:06:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:06:47,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:47,061 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:47,061 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:47,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:47,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-30 23:06:47,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:47,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:47,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:47,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:47,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:47,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:47,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:47,413 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:06:47,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 23:06:47,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:06:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:06:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:06:47,415 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-30 23:06:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:48,572 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-30 23:06:48,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:06:48,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-30 23:06:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:48,575 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:06:48,575 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:06:48,577 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 [2018-09-30 23:06:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:06:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-30 23:06:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:06:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-30 23:06:48,600 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-30 23:06:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:48,600 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-30 23:06:48,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:06:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-30 23:06:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:06:48,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:48,602 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:48,602 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:48,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:48,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-30 23:06:48,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:48,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:48,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:48,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:48,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:48,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:48,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:48,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:48,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:49,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:49,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 23:06:49,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:06:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:06:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:49,047 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-30 23:06:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:50,697 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-30 23:06:50,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:06:50,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 23:06:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:50,701 INFO L225 Difference]: With dead ends: 194 [2018-09-30 23:06:50,701 INFO L226 Difference]: Without dead ends: 192 [2018-09-30 23:06:50,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:06:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-30 23:06:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-30 23:06:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:06:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-30 23:06:50,744 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-30 23:06:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:50,744 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-30 23:06:50,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:06:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-30 23:06:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:06:50,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:50,751 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:50,751 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:50,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-30 23:06:50,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:50,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:50,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:50,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:50,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:50,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:50,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:50,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:50,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:51,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:51,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 23:06:51,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:51,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:51,250 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-30 23:06:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:52,669 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-30 23:06:52,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:06:52,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:06:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:52,674 INFO L225 Difference]: With dead ends: 246 [2018-09-30 23:06:52,674 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 23:06:52,674 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 [2018-09-30 23:06:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 23:06:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-30 23:06:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:06:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-30 23:06:52,707 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-30 23:06:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:52,707 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-30 23:06:52,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-30 23:06:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:06:52,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:52,709 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:52,709 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:52,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-30 23:06:52,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:52,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:52,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:52,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:52,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:53,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:53,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:53,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 23:06:53,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:53,633 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-30 23:06:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:55,603 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-30 23:06:55,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:06:55,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:06:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:55,608 INFO L225 Difference]: With dead ends: 288 [2018-09-30 23:06:55,608 INFO L226 Difference]: Without dead ends: 286 [2018-09-30 23:06:55,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:06:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-30 23:06:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-30 23:06:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:06:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-30 23:06:55,646 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-30 23:06:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:55,647 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-30 23:06:55,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-30 23:06:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:06:55,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:55,648 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:55,648 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:55,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-30 23:06:55,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:55,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:55,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:55,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:55,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:55,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 23:06:55,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:55,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:55,896 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-30 23:06:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:56,791 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-30 23:06:56,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:06:56,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:06:56,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:56,801 INFO L225 Difference]: With dead ends: 314 [2018-09-30 23:06:56,801 INFO L226 Difference]: Without dead ends: 312 [2018-09-30 23:06:56,802 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 [2018-09-30 23:06:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-30 23:06:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-30 23:06:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:06:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-30 23:06:56,842 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-30 23:06:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:56,842 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-30 23:06:56,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-30 23:06:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:06:56,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:56,843 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:56,844 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:56,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-30 23:06:56,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:56,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:56,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:56,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:56,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:56,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:56,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:56,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:56,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:57,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:57,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 23:06:57,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:06:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:06:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:57,088 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-30 23:06:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:57,984 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-30 23:06:57,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:06:57,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 23:06:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:57,994 INFO L225 Difference]: With dead ends: 322 [2018-09-30 23:06:57,994 INFO L226 Difference]: Without dead ends: 320 [2018-09-30 23:06:57,995 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 [2018-09-30 23:06:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-30 23:06:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-30 23:06:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-30 23:06:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-30 23:06:58,055 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-30 23:06:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:58,055 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-30 23:06:58,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:06:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-30 23:06:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:06:58,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:58,056 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:58,057 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:58,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-30 23:06:58,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:58,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:58,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:58,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:58,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:58,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:58,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:58,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:58,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:58,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:58,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 23:06:58,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:58,462 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-30 23:06:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:59,928 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-30 23:06:59,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:06:59,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:06:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:59,932 INFO L225 Difference]: With dead ends: 378 [2018-09-30 23:06:59,932 INFO L226 Difference]: Without dead ends: 376 [2018-09-30 23:06:59,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:06:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-30 23:07:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-30 23:07:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 23:07:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-30 23:07:00,005 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-30 23:07:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:00,006 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-30 23:07:00,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-30 23:07:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:00,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:00,007 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:00,007 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:00,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-30 23:07:00,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:00,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:00,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:00,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:00,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:00,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:00,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:00,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:00,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:00,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:00,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2018-09-30 23:07:00,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:00,316 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 15 states. [2018-09-30 23:07:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:01,814 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-30 23:07:01,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:01,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 23:07:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:01,817 INFO L225 Difference]: With dead ends: 395 [2018-09-30 23:07:01,817 INFO L226 Difference]: Without dead ends: 393 [2018-09-30 23:07:01,819 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 [2018-09-30 23:07:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-30 23:07:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-30 23:07:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-30 23:07:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-30 23:07:01,881 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-30 23:07:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:01,881 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-30 23:07:01,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-30 23:07:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:01,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:01,882 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:01,882 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:01,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:01,883 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-30 23:07:01,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:01,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:01,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:01,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:01,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:01,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:01,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:01,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:02,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:02,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:02,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-30 23:07:02,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:02,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:02,226 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 13 states. [2018-09-30 23:07:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:04,210 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-30 23:07:04,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:07:04,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 23:07:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:04,213 INFO L225 Difference]: With dead ends: 383 [2018-09-30 23:07:04,214 INFO L226 Difference]: Without dead ends: 381 [2018-09-30 23:07:04,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:07:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-30 23:07:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-30 23:07:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-30 23:07:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-30 23:07:04,272 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-30 23:07:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:04,272 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-30 23:07:04,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-30 23:07:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:07:04,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:04,273 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:04,274 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:04,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-30 23:07:04,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:04,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:04,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:04,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:04,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:04,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:04,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:04,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:04,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:04,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:04,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 23:07:04,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:04,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:04,580 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-30 23:07:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:06,062 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-30 23:07:06,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:07:06,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-30 23:07:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:06,065 INFO L225 Difference]: With dead ends: 429 [2018-09-30 23:07:06,065 INFO L226 Difference]: Without dead ends: 427 [2018-09-30 23:07:06,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:07:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-30 23:07:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-30 23:07:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-30 23:07:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-30 23:07:06,156 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-30 23:07:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:06,158 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-30 23:07:06,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-30 23:07:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:07:06,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:06,159 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:06,162 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:06,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-30 23:07:06,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:06,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:06,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:06,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:06,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:06,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:06,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:06,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:06,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:07,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:07,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 23:07:07,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:07,094 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-30 23:07:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:08,542 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-30 23:07:08,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:07:08,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-30 23:07:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:08,544 INFO L225 Difference]: With dead ends: 330 [2018-09-30 23:07:08,545 INFO L226 Difference]: Without dead ends: 328 [2018-09-30 23:07:08,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:07:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-30 23:07:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-30 23:07:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 23:07:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-30 23:07:08,600 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-30 23:07:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:08,600 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-30 23:07:08,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-30 23:07:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:08,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:08,601 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:08,602 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:08,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-30 23:07:08,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:08,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:08,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:08,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:08,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:08,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:08,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:08,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:08,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:08,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:08,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-30 23:07:08,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:08,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:08,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:08,892 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 12 states. [2018-09-30 23:07:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:09,426 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-30 23:07:09,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:07:09,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 23:07:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:09,433 INFO L225 Difference]: With dead ends: 271 [2018-09-30 23:07:09,433 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:07:09,434 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 [2018-09-30 23:07:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:07:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-30 23:07:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 23:07:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-30 23:07:09,508 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-30 23:07:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:09,509 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-30 23:07:09,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-30 23:07:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:09,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:09,512 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:09,512 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:09,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-30 23:07:09,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:09,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:09,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:09,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:09,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:09,992 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 [2018-09-30 23:07:10,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:10,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:10,139 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:10,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-30 23:07:10,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:10,140 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-30 23:07:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:12,556 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-30 23:07:12,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:07:12,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:12,559 INFO L225 Difference]: With dead ends: 741 [2018-09-30 23:07:12,559 INFO L226 Difference]: Without dead ends: 564 [2018-09-30 23:07:12,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:07:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-30 23:07:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-30 23:07:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 23:07:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-30 23:07:12,689 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-30 23:07:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:12,690 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-30 23:07:12,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-30 23:07:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:12,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:12,691 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:12,691 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:12,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:12,691 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-30 23:07:12,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:12,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:12,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:12,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:12,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:12,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:12,897 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 [2018-09-30 23:07:12,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:12,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:13,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:13,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 23:07:13,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:13,024 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-30 23:07:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:14,888 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-30 23:07:14,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:07:14,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:14,891 INFO L225 Difference]: With dead ends: 809 [2018-09-30 23:07:14,891 INFO L226 Difference]: Without dead ends: 470 [2018-09-30 23:07:14,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:07:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-30 23:07:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-30 23:07:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-30 23:07:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-30 23:07:15,064 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-30 23:07:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:15,065 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-30 23:07:15,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-30 23:07:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:15,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:15,066 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:15,066 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:15,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:15,067 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-30 23:07:15,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:15,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:15,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:15,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:15,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:15,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:15,162 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 [2018-09-30 23:07:15,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:15,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:15,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:15,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:07:15,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:15,320 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-30 23:07:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:17,068 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-30 23:07:17,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:07:17,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:17,072 INFO L225 Difference]: With dead ends: 1106 [2018-09-30 23:07:17,072 INFO L226 Difference]: Without dead ends: 724 [2018-09-30 23:07:17,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:07:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-30 23:07:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-30 23:07:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-30 23:07:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-30 23:07:17,373 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-30 23:07:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:17,373 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-30 23:07:17,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-30 23:07:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:17,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:17,375 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:17,375 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:17,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:17,376 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-30 23:07:17,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:17,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:17,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:17,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:17,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:17,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:17,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:07:17,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:17,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:17,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:17,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 23:07:17,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:17,728 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-30 23:07:18,601 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-30 23:07:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:19,255 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-30 23:07:19,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:07:19,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 23:07:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:19,262 INFO L225 Difference]: With dead ends: 711 [2018-09-30 23:07:19,262 INFO L226 Difference]: Without dead ends: 709 [2018-09-30 23:07:19,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:07:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-30 23:07:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-30 23:07:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-30 23:07:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-30 23:07:19,439 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-30 23:07:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:19,439 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-30 23:07:19,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-30 23:07:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:19,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:19,440 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:19,441 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:19,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-30 23:07:19,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:19,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:19,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:19,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:19,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:19,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:19,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:07:19,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:19,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:19,668 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:19,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-30 23:07:19,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:19,669 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-30 23:07:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:21,469 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-30 23:07:21,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:07:21,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:21,473 INFO L225 Difference]: With dead ends: 1319 [2018-09-30 23:07:21,473 INFO L226 Difference]: Without dead ends: 823 [2018-09-30 23:07:21,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:07:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-30 23:07:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-30 23:07:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-30 23:07:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-30 23:07:21,693 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-30 23:07:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:21,693 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-30 23:07:21,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-30 23:07:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:21,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:21,694 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:21,695 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:21,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-30 23:07:21,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:21,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:21,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:21,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:21,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:21,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:21,969 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 [2018-09-30 23:07:21,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:22,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:22,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:22,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-30 23:07:22,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:22,192 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 12 states. [2018-09-30 23:07:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:22,995 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-30 23:07:22,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:07:22,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 23:07:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:22,999 INFO L225 Difference]: With dead ends: 766 [2018-09-30 23:07:22,999 INFO L226 Difference]: Without dead ends: 764 [2018-09-30 23:07:22,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:07:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-30 23:07:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-30 23:07:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-30 23:07:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-30 23:07:23,195 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-30 23:07:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:23,196 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-30 23:07:23,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-30 23:07:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:23,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:23,197 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:23,197 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:23,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:23,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-30 23:07:23,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:23,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:23,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:23,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:23,797 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 [2018-09-30 23:07:23,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:23,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:24,067 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:24,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-30 23:07:24,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:24,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:24,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:24,068 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-30 23:07:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:26,899 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-30 23:07:26,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:07:26,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:26,904 INFO L225 Difference]: With dead ends: 2095 [2018-09-30 23:07:26,904 INFO L226 Difference]: Without dead ends: 1329 [2018-09-30 23:07:26,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:07:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-30 23:07:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-30 23:07:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-30 23:07:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-30 23:07:27,244 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-30 23:07:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:27,244 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-30 23:07:27,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-30 23:07:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:27,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:27,245 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:27,246 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:27,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:27,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-30 23:07:27,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:27,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:27,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:27,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:27,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:27,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:27,536 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 [2018-09-30 23:07:27,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:27,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:27,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:27,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 23:07:27,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:27,628 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-30 23:07:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:28,884 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-30 23:07:28,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:07:28,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 23:07:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:28,897 INFO L225 Difference]: With dead ends: 1291 [2018-09-30 23:07:28,897 INFO L226 Difference]: Without dead ends: 1289 [2018-09-30 23:07:28,898 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 [2018-09-30 23:07:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-30 23:07:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-30 23:07:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-30 23:07:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-30 23:07:29,201 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-30 23:07:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:29,202 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-30 23:07:29,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-30 23:07:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:29,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:29,203 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:29,203 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:29,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-30 23:07:29,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:29,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:29,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:29,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:29,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:29,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:29,317 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 [2018-09-30 23:07:29,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:29,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:29,451 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:07:29,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-30 23:07:29,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:29,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:29,452 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-30 23:07:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:30,998 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-30 23:07:31,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:07:31,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:31,011 INFO L225 Difference]: With dead ends: 2222 [2018-09-30 23:07:31,011 INFO L226 Difference]: Without dead ends: 1132 [2018-09-30 23:07:31,016 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 [2018-09-30 23:07:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-30 23:07:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-30 23:07:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-30 23:07:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-30 23:07:31,300 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-30 23:07:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:31,300 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-30 23:07:31,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-30 23:07:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:31,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:31,301 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:31,302 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:31,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:31,302 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-30 23:07:31,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:31,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:31,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:31,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:31,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:31,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:31,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:07:31,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:31,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:31,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:31,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:07:31,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:31,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:31,614 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-30 23:07:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:33,682 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-30 23:07:33,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:07:33,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 23:07:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:33,686 INFO L225 Difference]: With dead ends: 1989 [2018-09-30 23:07:33,686 INFO L226 Difference]: Without dead ends: 1130 [2018-09-30 23:07:33,690 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 [2018-09-30 23:07:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-30 23:07:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-30 23:07:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-30 23:07:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-30 23:07:33,979 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-30 23:07:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:33,979 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-30 23:07:33,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-30 23:07:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:07:33,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:33,980 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] [2018-09-30 23:07:33,980 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:33,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-30 23:07:33,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:33,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:33,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:33,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:33,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:34,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:34,102 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 [2018-09-30 23:07:34,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:34,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:34,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:34,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 23:07:34,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:34,291 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-30 23:07:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:35,623 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-30 23:07:35,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:35,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-30 23:07:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:35,628 INFO L225 Difference]: With dead ends: 1022 [2018-09-30 23:07:35,628 INFO L226 Difference]: Without dead ends: 1020 [2018-09-30 23:07:35,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:07:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-30 23:07:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-30 23:07:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-30 23:07:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-30 23:07:35,927 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-30 23:07:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:35,927 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-30 23:07:35,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-30 23:07:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:07:35,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:35,928 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] [2018-09-30 23:07:35,929 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:35,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-30 23:07:35,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:35,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:35,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:35,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:35,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:36,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:36,249 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 [2018-09-30 23:07:36,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:36,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:36,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:36,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 23:07:36,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:07:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:07:36,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:07:36,370 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-30 23:07:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:38,024 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-30 23:07:38,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:07:38,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 23:07:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:38,028 INFO L225 Difference]: With dead ends: 1127 [2018-09-30 23:07:38,028 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 23:07:38,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:07:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 23:07:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-30 23:07:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-30 23:07:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-30 23:07:38,337 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-30 23:07:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:38,337 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-30 23:07:38,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:07:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-30 23:07:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:07:38,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:38,339 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] [2018-09-30 23:07:38,340 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:38,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-30 23:07:38,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:38,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:38,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:38,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:38,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:38,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:38,726 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 [2018-09-30 23:07:38,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:38,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:39,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:39,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:07:39,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:39,323 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-30 23:07:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:41,033 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-30 23:07:41,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:07:41,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-30 23:07:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:41,038 INFO L225 Difference]: With dead ends: 1127 [2018-09-30 23:07:41,038 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 23:07:41,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:07:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 23:07:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-30 23:07:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-30 23:07:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-30 23:07:41,346 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-30 23:07:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:41,347 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-30 23:07:41,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-30 23:07:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:07:41,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:41,348 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:41,349 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:41,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-30 23:07:41,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:41,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:41,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:41,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:41,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:41,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:41,612 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 [2018-09-30 23:07:41,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:41,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:41,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:41,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-30 23:07:41,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:41,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:41,799 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-30 23:07:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:43,305 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-30 23:07:43,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:07:43,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-30 23:07:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:43,309 INFO L225 Difference]: With dead ends: 1072 [2018-09-30 23:07:43,309 INFO L226 Difference]: Without dead ends: 1070 [2018-09-30 23:07:43,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:07:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-30 23:07:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-30 23:07:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-30 23:07:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-30 23:07:43,610 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-30 23:07:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:43,610 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-30 23:07:43,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-30 23:07:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:07:43,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:43,612 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] [2018-09-30 23:07:43,614 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:43,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-30 23:07:43,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:43,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:43,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:43,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:43,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:07:43,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:43,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:43,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:43,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 23:07:43,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:07:43,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:07:43,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:07:43,931 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 10 states. [2018-09-30 23:07:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:45,400 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-30 23:07:45,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:07:45,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 23:07:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:45,404 INFO L225 Difference]: With dead ends: 1025 [2018-09-30 23:07:45,404 INFO L226 Difference]: Without dead ends: 1023 [2018-09-30 23:07:45,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:07:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-30 23:07:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-30 23:07:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-30 23:07:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-30 23:07:45,708 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-30 23:07:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:45,708 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-30 23:07:45,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:07:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-30 23:07:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:07:45,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:45,709 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:45,709 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:45,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-30 23:07:45,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:45,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:45,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:45,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:45,900 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 [2018-09-30 23:07:45,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:45,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:46,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:46,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-30 23:07:46,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:46,061 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-30 23:07:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:47,768 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-30 23:07:47,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:07:47,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-30 23:07:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:47,774 INFO L225 Difference]: With dead ends: 1057 [2018-09-30 23:07:47,774 INFO L226 Difference]: Without dead ends: 1055 [2018-09-30 23:07:47,775 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 [2018-09-30 23:07:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-30 23:07:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-30 23:07:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-30 23:07:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-30 23:07:48,075 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-30 23:07:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:48,075 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-30 23:07:48,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-30 23:07:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:07:48,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:48,076 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] [2018-09-30 23:07:48,076 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:48,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-30 23:07:48,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:48,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:48,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:48,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:48,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:49,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:49,005 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 [2018-09-30 23:07:49,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:49,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:49,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:49,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 23:07:49,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:49,372 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-30 23:07:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:52,141 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-30 23:07:52,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:07:52,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 23:07:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:52,147 INFO L225 Difference]: With dead ends: 1779 [2018-09-30 23:07:52,147 INFO L226 Difference]: Without dead ends: 1507 [2018-09-30 23:07:52,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1037, Invalid=3655, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:07:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-30 23:07:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-30 23:07:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-30 23:07:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-30 23:07:52,650 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-30 23:07:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:52,650 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-30 23:07:52,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-30 23:07:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:07:52,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:52,652 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:52,652 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:52,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:52,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-30 23:07:52,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:52,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:52,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:52,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:52,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:52,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:52,777 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 [2018-09-30 23:07:52,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:52,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:52,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:52,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 23:07:52,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:52,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:52,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:52,929 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-30 23:07:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:55,546 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-30 23:07:55,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:07:55,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 23:07:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:55,553 INFO L225 Difference]: With dead ends: 2685 [2018-09-30 23:07:55,553 INFO L226 Difference]: Without dead ends: 1652 [2018-09-30 23:07:55,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:07:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-30 23:07:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-30 23:07:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-30 23:07:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-30 23:07:56,020 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-30 23:07:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:56,020 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-30 23:07:56,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-30 23:07:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:07:56,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:56,022 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] [2018-09-30 23:07:56,022 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:56,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-30 23:07:56,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:56,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:56,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:56,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:56,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:56,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:56,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:07:56,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:56,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:56,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:56,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 23:07:56,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:56,333 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-30 23:07:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:59,082 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-30 23:07:59,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:07:59,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 23:07:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:59,090 INFO L225 Difference]: With dead ends: 2130 [2018-09-30 23:07:59,090 INFO L226 Difference]: Without dead ends: 1946 [2018-09-30 23:07:59,091 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 [2018-09-30 23:07:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-30 23:07:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-30 23:07:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-30 23:07:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-30 23:07:59,767 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-30 23:07:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:59,767 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-30 23:07:59,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-30 23:07:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:07:59,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:59,769 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:59,769 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:59,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-30 23:07:59,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:59,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:59,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:59,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:59,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:00,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:00,005 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 [2018-09-30 23:08:00,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:00,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:00,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:00,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 23:08:00,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:08:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:08:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:08:00,137 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-30 23:08:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:03,069 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-30 23:08:03,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:08:03,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 23:08:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:03,079 INFO L225 Difference]: With dead ends: 3372 [2018-09-30 23:08:03,079 INFO L226 Difference]: Without dead ends: 2040 [2018-09-30 23:08:03,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:08:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-30 23:08:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-30 23:08:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-30 23:08:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-30 23:08:03,693 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-30 23:08:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:03,694 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-30 23:08:03,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:08:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-30 23:08:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:08:03,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:03,696 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:03,697 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:03,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-30 23:08:03,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:03,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:03,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:03,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:03,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:03,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:03,939 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 [2018-09-30 23:08:03,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:03,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:03,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:03,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:04,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:04,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 23:08:04,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:08:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:08:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:08:04,236 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-30 23:08:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:11,326 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-30 23:08:11,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:08:11,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-30 23:08:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:11,336 INFO L225 Difference]: With dead ends: 2646 [2018-09-30 23:08:11,336 INFO L226 Difference]: Without dead ends: 2644 [2018-09-30 23:08:11,338 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 [2018-09-30 23:08:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-30 23:08:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-30 23:08:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-30 23:08:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-30 23:08:12,060 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-30 23:08:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:12,060 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-30 23:08:12,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:08:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-30 23:08:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:08:12,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:12,063 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:12,063 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:12,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:12,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-30 23:08:12,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:12,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:12,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:12,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:12,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:12,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:12,400 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 [2018-09-30 23:08:12,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:12,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:12,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:12,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:12,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:12,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-30 23:08:12,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:08:12,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:08:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:08:12,650 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. [2018-09-30 23:08:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:19,624 INFO L93 Difference]: Finished difference Result 2887 states and 4117 transitions. [2018-09-30 23:08:19,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:08:19,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-09-30 23:08:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:19,632 INFO L225 Difference]: With dead ends: 2887 [2018-09-30 23:08:19,632 INFO L226 Difference]: Without dead ends: 2885 [2018-09-30 23:08:19,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3166, Invalid=9716, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:08:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-09-30 23:08:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2102. [2018-09-30 23:08:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2018-09-30 23:08:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2970 transitions. [2018-09-30 23:08:20,446 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2970 transitions. Word has length 29 [2018-09-30 23:08:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:20,446 INFO L480 AbstractCegarLoop]: Abstraction has 2102 states and 2970 transitions. [2018-09-30 23:08:20,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:08:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2970 transitions. [2018-09-30 23:08:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:08:20,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:20,449 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] [2018-09-30 23:08:20,449 INFO L423 AbstractCegarLoop]: === Iteration 41 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:20,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1174012687, now seen corresponding path program 2 times [2018-09-30 23:08:20,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:20,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:20,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:20,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:20,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:08:20,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:20,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:08:20,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:20,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:20,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:20,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:21,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:21,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-30 23:08:21,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:08:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:08:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:08:21,087 INFO L87 Difference]: Start difference. First operand 2102 states and 2970 transitions. Second operand 16 states. [2018-09-30 23:08:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:26,391 INFO L93 Difference]: Finished difference Result 6948 states and 9725 transitions. [2018-09-30 23:08:26,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:08:26,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-30 23:08:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:26,404 INFO L225 Difference]: With dead ends: 6948 [2018-09-30 23:08:26,404 INFO L226 Difference]: Without dead ends: 4896 [2018-09-30 23:08:26,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:08:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2018-09-30 23:08:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 3634. [2018-09-30 23:08:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2018-09-30 23:08:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5080 transitions. [2018-09-30 23:08:27,959 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5080 transitions. Word has length 33 [2018-09-30 23:08:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:27,960 INFO L480 AbstractCegarLoop]: Abstraction has 3634 states and 5080 transitions. [2018-09-30 23:08:27,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:08:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5080 transitions. [2018-09-30 23:08:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:08:27,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:27,963 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] [2018-09-30 23:08:27,963 INFO L423 AbstractCegarLoop]: === Iteration 42 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:27,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2110003385, now seen corresponding path program 1 times [2018-09-30 23:08:27,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:27,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:27,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:27,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:27,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:28,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:28,174 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 [2018-09-30 23:08:28,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:28,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:08:28,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:28,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-30 23:08:28,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:28,361 INFO L87 Difference]: Start difference. First operand 3634 states and 5080 transitions. Second operand 18 states. [2018-09-30 23:08:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:35,049 INFO L93 Difference]: Finished difference Result 5436 states and 7576 transitions. [2018-09-30 23:08:35,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:08:35,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 23:08:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:35,063 INFO L225 Difference]: With dead ends: 5436 [2018-09-30 23:08:35,063 INFO L226 Difference]: Without dead ends: 5349 [2018-09-30 23:08:35,066 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 [2018-09-30 23:08:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2018-09-30 23:08:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4022. [2018-09-30 23:08:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2018-09-30 23:08:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5648 transitions. [2018-09-30 23:08:36,861 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5648 transitions. Word has length 33 [2018-09-30 23:08:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:36,862 INFO L480 AbstractCegarLoop]: Abstraction has 4022 states and 5648 transitions. [2018-09-30 23:08:36,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5648 transitions. [2018-09-30 23:08:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:08:36,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:36,865 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] [2018-09-30 23:08:36,865 INFO L423 AbstractCegarLoop]: === Iteration 43 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:36,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash -895180230, now seen corresponding path program 3 times [2018-09-30 23:08:36,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:36,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:36,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:36,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:36,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:37,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:37,275 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 [2018-09-30 23:08:37,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:08:37,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:08:37,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:37,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:08:38,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:38,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 23:08:38,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:08:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:08:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:08:38,229 INFO L87 Difference]: Start difference. First operand 4022 states and 5648 transitions. Second operand 22 states. [2018-09-30 23:08:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:50,137 INFO L93 Difference]: Finished difference Result 8032 states and 11417 transitions. [2018-09-30 23:08:50,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:08:50,137 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2018-09-30 23:08:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:50,154 INFO L225 Difference]: With dead ends: 8032 [2018-09-30 23:08:50,154 INFO L226 Difference]: Without dead ends: 7935 [2018-09-30 23:08:50,158 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 [2018-09-30 23:08:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2018-09-30 23:08:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 4327. [2018-09-30 23:08:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2018-09-30 23:08:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 6121 transitions. [2018-09-30 23:08:52,107 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 6121 transitions. Word has length 33 [2018-09-30 23:08:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:52,107 INFO L480 AbstractCegarLoop]: Abstraction has 4327 states and 6121 transitions. [2018-09-30 23:08:52,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:08:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 6121 transitions. [2018-09-30 23:08:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:08:52,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:52,112 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] [2018-09-30 23:08:52,112 INFO L423 AbstractCegarLoop]: === Iteration 44 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:52,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1250173630, now seen corresponding path program 1 times [2018-09-30 23:08:52,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:52,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:52,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:52,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:52,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:52,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:52,241 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 [2018-09-30 23:08:52,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:52,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:08:52,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:52,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 23:08:52,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:08:52,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:08:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:08:52,493 INFO L87 Difference]: Start difference. First operand 4327 states and 6121 transitions. Second operand 19 states. [2018-09-30 23:09:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:00,731 INFO L93 Difference]: Finished difference Result 9177 states and 12958 transitions. [2018-09-30 23:09:00,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:09:00,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 23:09:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:00,747 INFO L225 Difference]: With dead ends: 9177 [2018-09-30 23:09:00,747 INFO L226 Difference]: Without dead ends: 5991 [2018-09-30 23:09:00,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4514 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2969, Invalid=11311, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:09:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2018-09-30 23:09:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 4147. [2018-09-30 23:09:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4147 states. [2018-09-30 23:09:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 5817 transitions. [2018-09-30 23:09:02,782 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 5817 transitions. Word has length 33 [2018-09-30 23:09:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:02,782 INFO L480 AbstractCegarLoop]: Abstraction has 4147 states and 5817 transitions. [2018-09-30 23:09:02,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:09:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 5817 transitions. [2018-09-30 23:09:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:09:02,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:02,786 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] [2018-09-30 23:09:02,786 INFO L423 AbstractCegarLoop]: === Iteration 45 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:02,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1810158453, now seen corresponding path program 2 times [2018-09-30 23:09:02,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:02,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:02,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:03,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:03,340 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 [2018-09-30 23:09:03,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:03,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:03,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:03,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:03,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:03,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-09-30 23:09:03,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:09:03,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:09:03,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:09:03,574 INFO L87 Difference]: Start difference. First operand 4147 states and 5817 transitions. Second operand 18 states. [2018-09-30 23:09:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:09,073 INFO L93 Difference]: Finished difference Result 5255 states and 7327 transitions. [2018-09-30 23:09:09,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:09:09,073 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 23:09:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:09,081 INFO L225 Difference]: With dead ends: 5255 [2018-09-30 23:09:09,081 INFO L226 Difference]: Without dead ends: 5253 [2018-09-30 23:09:09,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:09:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2018-09-30 23:09:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4447. [2018-09-30 23:09:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2018-09-30 23:09:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6228 transitions. [2018-09-30 23:09:11,186 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6228 transitions. Word has length 33 [2018-09-30 23:09:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:11,186 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 6228 transitions. [2018-09-30 23:09:11,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:09:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6228 transitions. [2018-09-30 23:09:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:09:11,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:11,191 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] [2018-09-30 23:09:11,191 INFO L423 AbstractCegarLoop]: === Iteration 46 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:11,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:11,191 INFO L82 PathProgramCache]: Analyzing trace with hash -667748710, now seen corresponding path program 1 times [2018-09-30 23:09:11,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:11,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:11,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:11,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:11,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:11,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:11,688 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 [2018-09-30 23:09:11,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:11,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:11,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:11,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-30 23:09:11,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:09:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:09:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:09:11,917 INFO L87 Difference]: Start difference. First operand 4447 states and 6228 transitions. Second operand 18 states. [2018-09-30 23:09:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:22,223 INFO L93 Difference]: Finished difference Result 7721 states and 10805 transitions. [2018-09-30 23:09:22,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:09:22,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 23:09:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:22,232 INFO L225 Difference]: With dead ends: 7721 [2018-09-30 23:09:22,232 INFO L226 Difference]: Without dead ends: 7719 [2018-09-30 23:09:22,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1278, Invalid=8228, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:09:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-09-30 23:09:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 5438. [2018-09-30 23:09:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2018-09-30 23:09:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 7651 transitions. [2018-09-30 23:09:24,853 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 7651 transitions. Word has length 33 [2018-09-30 23:09:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:24,853 INFO L480 AbstractCegarLoop]: Abstraction has 5438 states and 7651 transitions. [2018-09-30 23:09:24,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:09:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 7651 transitions. [2018-09-30 23:09:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:09:24,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:24,857 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] [2018-09-30 23:09:24,858 INFO L423 AbstractCegarLoop]: === Iteration 47 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:24,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1146614399, now seen corresponding path program 2 times [2018-09-30 23:09:24,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:24,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:24,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:09:24,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:24,947 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 [2018-09-30 23:09:24,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:25,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:25,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:25,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:09:25,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:25,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-30 23:09:25,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:09:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:09:25,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:09:25,120 INFO L87 Difference]: Start difference. First operand 5438 states and 7651 transitions. Second operand 16 states. [2018-09-30 23:09:26,850 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-30 23:09:28,799 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-30 23:09:29,224 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-30 23:09:29,538 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-30 23:09:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:34,761 INFO L93 Difference]: Finished difference Result 15976 states and 22278 transitions. [2018-09-30 23:09:34,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:09:34,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-30 23:09:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:34,776 INFO L225 Difference]: With dead ends: 15976 [2018-09-30 23:09:34,776 INFO L226 Difference]: Without dead ends: 10483 [2018-09-30 23:09:34,789 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 [2018-09-30 23:09:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2018-09-30 23:09:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8111. [2018-09-30 23:09:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2018-09-30 23:09:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11260 transitions. [2018-09-30 23:09:38,886 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11260 transitions. Word has length 33 [2018-09-30 23:09:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:38,887 INFO L480 AbstractCegarLoop]: Abstraction has 8111 states and 11260 transitions. [2018-09-30 23:09:38,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:09:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11260 transitions. [2018-09-30 23:09:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:09:38,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:38,891 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] [2018-09-30 23:09:38,892 INFO L423 AbstractCegarLoop]: === Iteration 48 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:38,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1449531796, now seen corresponding path program 1 times [2018-09-30 23:09:38,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:38,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:38,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:38,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:38,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:39,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:39,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:09:39,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:39,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:39,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:39,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-09-30 23:09:39,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:09:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:09:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:09:39,249 INFO L87 Difference]: Start difference. First operand 8111 states and 11260 transitions. Second operand 19 states. [2018-09-30 23:09:40,092 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-09-30 23:09:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:48,282 INFO L93 Difference]: Finished difference Result 10277 states and 14246 transitions. [2018-09-30 23:09:48,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:09:48,282 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 23:09:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:48,296 INFO L225 Difference]: With dead ends: 10277 [2018-09-30 23:09:48,296 INFO L226 Difference]: Without dead ends: 10275 [2018-09-30 23:09:48,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=978, Invalid=4424, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:09:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2018-09-30 23:09:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 8291. [2018-09-30 23:09:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8291 states. [2018-09-30 23:09:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 11531 transitions. [2018-09-30 23:09:52,672 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 11531 transitions. Word has length 33 [2018-09-30 23:09:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:52,672 INFO L480 AbstractCegarLoop]: Abstraction has 8291 states and 11531 transitions. [2018-09-30 23:09:52,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:09:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 11531 transitions. [2018-09-30 23:09:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:09:52,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:52,678 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] [2018-09-30 23:09:52,678 INFO L423 AbstractCegarLoop]: === Iteration 49 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:52,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1026480992, now seen corresponding path program 1 times [2018-09-30 23:09:52,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:52,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:52,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:52,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:52,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:09:53,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:53,195 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 [2018-09-30 23:09:53,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:53,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:09:53,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:53,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 23:09:53,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:09:53,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:09:53,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:09:53,403 INFO L87 Difference]: Start difference. First operand 8291 states and 11531 transitions. Second operand 19 states. [2018-09-30 23:10:03,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:03,758 INFO L93 Difference]: Finished difference Result 16294 states and 22694 transitions. [2018-09-30 23:10:03,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:10:03,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 23:10:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:03,771 INFO L225 Difference]: With dead ends: 16294 [2018-09-30 23:10:03,771 INFO L226 Difference]: Without dead ends: 9999 [2018-09-30 23:10:03,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4530 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2859, Invalid=11183, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:10:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9999 states. [2018-09-30 23:10:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9999 to 8241. [2018-09-30 23:10:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-09-30 23:10:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11466 transitions. [2018-09-30 23:10:07,835 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11466 transitions. Word has length 33 [2018-09-30 23:10:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:07,835 INFO L480 AbstractCegarLoop]: Abstraction has 8241 states and 11466 transitions. [2018-09-30 23:10:07,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:10:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11466 transitions. [2018-09-30 23:10:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:10:07,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:07,839 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] [2018-09-30 23:10:07,839 INFO L423 AbstractCegarLoop]: === Iteration 50 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:07,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 610357864, now seen corresponding path program 3 times [2018-09-30 23:10:07,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:07,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:07,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:07,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:07,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:08,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:08,067 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 [2018-09-30 23:10:08,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:10:08,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:10:08,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:10:08,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:10:08,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:08,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2018-09-30 23:10:08,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:10:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:10:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:10:08,269 INFO L87 Difference]: Start difference. First operand 8241 states and 11466 transitions. Second operand 21 states. [2018-09-30 23:10:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:28,333 INFO L93 Difference]: Finished difference Result 25684 states and 35500 transitions. [2018-09-30 23:10:28,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-09-30 23:10:28,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-30 23:10:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:28,351 INFO L225 Difference]: With dead ends: 25684 [2018-09-30 23:10:28,351 INFO L226 Difference]: Without dead ends: 16698 [2018-09-30 23:10:28,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18096 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6678, Invalid=35142, Unknown=0, NotChecked=0, Total=41820 [2018-09-30 23:10:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2018-09-30 23:10:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10011. [2018-09-30 23:10:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10011 states. [2018-09-30 23:10:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 13930 transitions. [2018-09-30 23:10:33,744 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 13930 transitions. Word has length 33 [2018-09-30 23:10:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:33,745 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 13930 transitions. [2018-09-30 23:10:33,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:10:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 13930 transitions. [2018-09-30 23:10:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:10:33,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:33,749 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] [2018-09-30 23:10:33,749 INFO L423 AbstractCegarLoop]: === Iteration 51 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:33,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash 690693469, now seen corresponding path program 1 times [2018-09-30 23:10:33,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:33,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:33,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:33,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:10:33,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:33,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:33,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:10:33,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:34,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:34,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:34,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-09-30 23:10:34,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:10:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:10:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:10:34,210 INFO L87 Difference]: Start difference. First operand 10011 states and 13930 transitions. Second operand 21 states. [2018-09-30 23:10:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:46,384 INFO L93 Difference]: Finished difference Result 12668 states and 17557 transitions. [2018-09-30 23:10:46,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:10:46,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-30 23:10:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:46,399 INFO L225 Difference]: With dead ends: 12668 [2018-09-30 23:10:46,399 INFO L226 Difference]: Without dead ends: 12586 [2018-09-30 23:10:46,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=841, Invalid=6131, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:10:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2018-09-30 23:10:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10468. [2018-09-30 23:10:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2018-09-30 23:10:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 14569 transitions. [2018-09-30 23:10:51,956 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 14569 transitions. Word has length 33 [2018-09-30 23:10:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:51,956 INFO L480 AbstractCegarLoop]: Abstraction has 10468 states and 14569 transitions. [2018-09-30 23:10:51,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:10:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 14569 transitions. [2018-09-30 23:10:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:10:51,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:51,962 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:51,962 INFO L423 AbstractCegarLoop]: === Iteration 52 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:51,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2121918017, now seen corresponding path program 3 times [2018-09-30 23:10:51,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:51,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:51,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:51,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:51,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:52,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:52,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:52,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:10:52,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:10:52,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:10:52,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:52,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:52,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 23:10:52,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:10:52,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:10:52,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:10:52,434 INFO L87 Difference]: Start difference. First operand 10468 states and 14569 transitions. Second operand 17 states. [2018-09-30 23:11:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:02,138 INFO L93 Difference]: Finished difference Result 12762 states and 17754 transitions. [2018-09-30 23:11:02,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:11:02,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-30 23:11:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:02,158 INFO L225 Difference]: With dead ends: 12762 [2018-09-30 23:11:02,159 INFO L226 Difference]: Without dead ends: 12760 [2018-09-30 23:11:02,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=420, Invalid=1472, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:11:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12760 states. [2018-09-30 23:11:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12760 to 11736. [2018-09-30 23:11:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11736 states. [2018-09-30 23:11:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11736 states to 11736 states and 16328 transitions. [2018-09-30 23:11:07,857 INFO L78 Accepts]: Start accepts. Automaton has 11736 states and 16328 transitions. Word has length 33 [2018-09-30 23:11:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:07,857 INFO L480 AbstractCegarLoop]: Abstraction has 11736 states and 16328 transitions. [2018-09-30 23:11:07,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:11:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 11736 states and 16328 transitions. [2018-09-30 23:11:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:11:07,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:07,863 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:11:07,863 INFO L423 AbstractCegarLoop]: === Iteration 53 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:07,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash 80606408, now seen corresponding path program 2 times [2018-09-30 23:11:07,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:07,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:07,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:11:07,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:11:08,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:08,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:08,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:11:08,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:11:08,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:08,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 23:11:08,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:08,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 23:11:08,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:11:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:11:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:11:08,309 INFO L87 Difference]: Start difference. First operand 11736 states and 16328 transitions. Second operand 19 states. [2018-09-30 23:11:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:21,065 INFO L93 Difference]: Finished difference Result 25424 states and 35313 transitions. [2018-09-30 23:11:21,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:11:21,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-30 23:11:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:21,086 INFO L225 Difference]: With dead ends: 25424 [2018-09-30 23:11:21,086 INFO L226 Difference]: Without dead ends: 14735 [2018-09-30 23:11:21,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2133, Invalid=8997, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:11:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14735 states. [2018-09-30 23:11:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14735 to 10838. [2018-09-30 23:11:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10838 states. [2018-09-30 23:11:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10838 states to 10838 states and 15028 transitions. [2018-09-30 23:11:27,206 INFO L78 Accepts]: Start accepts. Automaton has 10838 states and 15028 transitions. Word has length 37 [2018-09-30 23:11:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:27,206 INFO L480 AbstractCegarLoop]: Abstraction has 10838 states and 15028 transitions. [2018-09-30 23:11:27,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:11:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10838 states and 15028 transitions. [2018-09-30 23:11:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:11:27,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:27,212 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:11:27,212 INFO L423 AbstractCegarLoop]: === Iteration 54 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:27,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1325274289, now seen corresponding path program 2 times [2018-09-30 23:11:27,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:27,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:27,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:27,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:11:27,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:11:28,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:28,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:28,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:11:28,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:11:28,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:28,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:28,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:28,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2018-09-30 23:11:28,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:11:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:11:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:11:28,578 INFO L87 Difference]: Start difference. First operand 10838 states and 15028 transitions. Second operand 25 states. [2018-09-30 23:11:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:51,923 INFO L93 Difference]: Finished difference Result 17992 states and 24899 transitions. [2018-09-30 23:11:51,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:11:51,924 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2018-09-30 23:11:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:51,941 INFO L225 Difference]: With dead ends: 17992 [2018-09-30 23:11:51,941 INFO L226 Difference]: Without dead ends: 17955 [2018-09-30 23:11:51,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9623 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6159, Invalid=21231, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:11:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2018-09-30 23:11:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 9576. [2018-09-30 23:11:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9576 states. [2018-09-30 23:11:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 13148 transitions. [2018-09-30 23:11:57,189 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 13148 transitions. Word has length 37 [2018-09-30 23:11:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:57,190 INFO L480 AbstractCegarLoop]: Abstraction has 9576 states and 13148 transitions. [2018-09-30 23:11:57,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:11:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 13148 transitions. [2018-09-30 23:11:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:11:57,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:57,195 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:11:57,195 INFO L423 AbstractCegarLoop]: === Iteration 55 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:57,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1124964136, now seen corresponding path program 3 times [2018-09-30 23:11:57,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:57,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:57,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:57,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:11:57,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:57,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:57,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:57,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:11:57,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:11:57,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:57,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:57,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:57,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-30 23:11:57,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:11:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:11:57,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:11:57,920 INFO L87 Difference]: Start difference. First operand 9576 states and 13148 transitions. Second operand 18 states. [2018-09-30 23:12:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:08,016 INFO L93 Difference]: Finished difference Result 11756 states and 16101 transitions. [2018-09-30 23:12:08,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:12:08,017 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2018-09-30 23:12:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:08,027 INFO L225 Difference]: With dead ends: 11756 [2018-09-30 23:12:08,028 INFO L226 Difference]: Without dead ends: 11755 [2018-09-30 23:12:08,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=619, Invalid=2351, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:12:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11755 states. [2018-09-30 23:12:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11755 to 9584. [2018-09-30 23:12:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9584 states. [2018-09-30 23:12:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 13159 transitions. [2018-09-30 23:12:13,226 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 13159 transitions. Word has length 37 [2018-09-30 23:12:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:13,226 INFO L480 AbstractCegarLoop]: Abstraction has 9584 states and 13159 transitions. [2018-09-30 23:12:13,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:12:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 13159 transitions. [2018-09-30 23:12:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:12:13,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:13,233 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:12:13,233 INFO L423 AbstractCegarLoop]: === Iteration 56 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:13,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1901181737, now seen corresponding path program 4 times [2018-09-30 23:12:13,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:13,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:13,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:13,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:12:13,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:12:13,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:13,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:13,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:12:13,481 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:12:13,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:12:13,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-30 23:12:13,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:13,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-30 23:12:13,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:12:13,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:12:13,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:12:13,904 INFO L87 Difference]: Start difference. First operand 9584 states and 13159 transitions. Second operand 20 states. [2018-09-30 23:12:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:32,247 INFO L93 Difference]: Finished difference Result 22344 states and 30715 transitions. [2018-09-30 23:12:32,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:12:32,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-09-30 23:12:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:32,265 INFO L225 Difference]: With dead ends: 22344 [2018-09-30 23:12:32,265 INFO L226 Difference]: Without dead ends: 15564 [2018-09-30 23:12:32,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12146 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4708, Invalid=26092, Unknown=0, NotChecked=0, Total=30800 [2018-09-30 23:12:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15564 states. [2018-09-30 23:12:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15564 to 9928. [2018-09-30 23:12:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9928 states. [2018-09-30 23:12:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 13680 transitions. [2018-09-30 23:12:37,891 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 13680 transitions. Word has length 37 [2018-09-30 23:12:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:37,892 INFO L480 AbstractCegarLoop]: Abstraction has 9928 states and 13680 transitions. [2018-09-30 23:12:37,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:12:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 13680 transitions. [2018-09-30 23:12:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:12:37,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:37,897 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:12:37,897 INFO L423 AbstractCegarLoop]: === Iteration 57 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:37,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2049901089, now seen corresponding path program 4 times [2018-09-30 23:12:37,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:37,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:37,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:37,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:12:37,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:12:39,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:39,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:39,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:12:39,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:12:39,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:12:39,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-30 23:12:39,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:39,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2018-09-30 23:12:39,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:12:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:12:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:12:39,458 INFO L87 Difference]: Start difference. First operand 9928 states and 13680 transitions. Second operand 21 states. [2018-09-30 23:13:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:13:07,008 INFO L93 Difference]: Finished difference Result 19809 states and 27499 transitions. [2018-09-30 23:13:07,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2018-09-30 23:13:07,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-30 23:13:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:13:07,030 INFO L225 Difference]: With dead ends: 19809 [2018-09-30 23:13:07,030 INFO L226 Difference]: Without dead ends: 19792 [2018-09-30 23:13:07,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23116 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=8920, Invalid=47962, Unknown=0, NotChecked=0, Total=56882 [2018-09-30 23:13:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19792 states. [2018-09-30 23:13:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19792 to 10133. [2018-09-30 23:13:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10133 states. [2018-09-30 23:13:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 13978 transitions. [2018-09-30 23:13:13,126 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 13978 transitions. Word has length 41 [2018-09-30 23:13:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:13:13,126 INFO L480 AbstractCegarLoop]: Abstraction has 10133 states and 13978 transitions. [2018-09-30 23:13:13,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:13:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 13978 transitions. [2018-09-30 23:13:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:13:13,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:13:13,132 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:13:13,133 INFO L423 AbstractCegarLoop]: === Iteration 58 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:13:13,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:13:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1746619016, now seen corresponding path program 3 times [2018-09-30 23:13:13,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:13:13,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:13:13,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:13,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:13:13,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:13:14,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:13:14,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:13:14,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:13:14,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:13:14,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:13:14,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:13:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:13:14,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:13:14,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2018-09-30 23:13:14,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:13:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:13:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:13:14,429 INFO L87 Difference]: Start difference. First operand 10133 states and 13978 transitions. Second operand 28 states. [2018-09-30 23:13:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:13:45,941 INFO L93 Difference]: Finished difference Result 16574 states and 22746 transitions. [2018-09-30 23:13:45,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2018-09-30 23:13:45,942 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 44 [2018-09-30 23:13:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:13:45,959 INFO L225 Difference]: With dead ends: 16574 [2018-09-30 23:13:45,960 INFO L226 Difference]: Without dead ends: 16131 [2018-09-30 23:13:45,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24884 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=9737, Invalid=52015, Unknown=0, NotChecked=0, Total=61752 [2018-09-30 23:13:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16131 states. [2018-09-30 23:13:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16131 to 10492. [2018-09-30 23:13:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10492 states. [2018-09-30 23:13:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 14542 transitions. [2018-09-30 23:13:52,816 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 14542 transitions. Word has length 44 [2018-09-30 23:13:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:13:52,816 INFO L480 AbstractCegarLoop]: Abstraction has 10492 states and 14542 transitions. [2018-09-30 23:13:52,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:13:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 14542 transitions. [2018-09-30 23:13:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:13:52,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:13:52,824 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:13:52,824 INFO L423 AbstractCegarLoop]: === Iteration 59 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:13:52,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:13:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash -892524058, now seen corresponding path program 1 times [2018-09-30 23:13:52,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:13:52,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:13:52,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:52,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:13:52,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:13:53,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:13:53,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:13:53,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:13:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:53,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:13:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:13:53,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:13:53,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2018-09-30 23:13:53,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:13:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:13:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:13:53,478 INFO L87 Difference]: Start difference. First operand 10492 states and 14542 transitions. Second operand 26 states. [2018-09-30 23:14:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:14:14,265 INFO L93 Difference]: Finished difference Result 15687 states and 21774 transitions. [2018-09-30 23:14:14,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:14:14,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-09-30 23:14:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:14:14,282 INFO L225 Difference]: With dead ends: 15687 [2018-09-30 23:14:14,283 INFO L226 Difference]: Without dead ends: 15274 [2018-09-30 23:14:14,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5978 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2813, Invalid=13957, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:14:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15274 states. [2018-09-30 23:14:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15274 to 11667. [2018-09-30 23:14:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11667 states. [2018-09-30 23:14:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11667 states to 11667 states and 16289 transitions. [2018-09-30 23:14:21,893 INFO L78 Accepts]: Start accepts. Automaton has 11667 states and 16289 transitions. Word has length 44 [2018-09-30 23:14:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:14:21,893 INFO L480 AbstractCegarLoop]: Abstraction has 11667 states and 16289 transitions. [2018-09-30 23:14:21,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:14:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 11667 states and 16289 transitions. [2018-09-30 23:14:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:14:21,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:14:21,901 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:14:21,901 INFO L423 AbstractCegarLoop]: === Iteration 60 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:14:21,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:14:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -837801895, now seen corresponding path program 5 times [2018-09-30 23:14:21,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:14:21,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:14:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:21,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:14:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:14:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:14:22,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:14:22,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:14:22,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:14:22,184 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:14:22,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:14:22,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:14:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 58 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:14:23,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:14:23,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2018-09-30 23:14:23,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:14:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:14:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=666, Unknown=2, NotChecked=0, Total=756 [2018-09-30 23:14:23,548 INFO L87 Difference]: Start difference. First operand 11667 states and 16289 transitions. Second operand 28 states. [2018-09-30 23:14:24,938 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2018-09-30 23:14:31,527 WARN L178 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2018-09-30 23:14:34,098 WARN L178 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-09-30 23:14:35,346 WARN L178 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-30 23:14:53,832 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-09-30 23:15:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:15:34,410 INFO L93 Difference]: Finished difference Result 34964 states and 49113 transitions. [2018-09-30 23:15:34,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2018-09-30 23:15:34,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2018-09-30 23:15:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:15:34,449 INFO L225 Difference]: With dead ends: 34964 [2018-09-30 23:15:34,449 INFO L226 Difference]: Without dead ends: 34958 [2018-09-30 23:15:34,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 415 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92867 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=35224, Invalid=138222, Unknown=26, NotChecked=0, Total=173472 [2018-09-30 23:15:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2018-09-30 23:15:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 16142. [2018-09-30 23:15:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16142 states. [2018-09-30 23:15:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16142 states to 16142 states and 22727 transitions. [2018-09-30 23:15:44,836 INFO L78 Accepts]: Start accepts. Automaton has 16142 states and 22727 transitions. Word has length 45 [2018-09-30 23:15:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:15:44,836 INFO L480 AbstractCegarLoop]: Abstraction has 16142 states and 22727 transitions. [2018-09-30 23:15:44,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:15:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16142 states and 22727 transitions. [2018-09-30 23:15:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:15:44,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:15:44,847 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:15:44,847 INFO L423 AbstractCegarLoop]: === Iteration 61 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:15:44,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:15:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1168653623, now seen corresponding path program 3 times [2018-09-30 23:15:44,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:15:44,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:15:44,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:44,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:15:44,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-30 23:15:45,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:15:45,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:15:45,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:15:45,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:15:45,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:15:45,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:15:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-30 23:15:45,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:15:45,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2018-09-30 23:15:45,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:15:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:15:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:15:45,294 INFO L87 Difference]: Start difference. First operand 16142 states and 22727 transitions. Second operand 17 states. [2018-09-30 23:16:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:16:02,842 INFO L93 Difference]: Finished difference Result 18567 states and 26136 transitions. [2018-09-30 23:16:02,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:16:02,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-09-30 23:16:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:16:02,861 INFO L225 Difference]: With dead ends: 18567 [2018-09-30 23:16:02,861 INFO L226 Difference]: Without dead ends: 18565 [2018-09-30 23:16:02,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1576, Invalid=6796, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:16:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18565 states. [2018-09-30 23:16:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18565 to 14353. [2018-09-30 23:16:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14353 states. [2018-09-30 23:16:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 20192 transitions. [2018-09-30 23:16:13,064 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 20192 transitions. Word has length 49 [2018-09-30 23:16:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:16:13,065 INFO L480 AbstractCegarLoop]: Abstraction has 14353 states and 20192 transitions. [2018-09-30 23:16:13,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:16:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 20192 transitions. [2018-09-30 23:16:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:16:13,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:16:13,075 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:16:13,076 INFO L423 AbstractCegarLoop]: === Iteration 62 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:16:13,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:16:13,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1986327233, now seen corresponding path program 6 times [2018-09-30 23:16:13,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:16:13,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:16:13,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:13,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:16:13,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:16:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 56 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 23:16:13,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:16:13,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:16:13,307 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:16:13,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:16:13,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:16:13,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:16:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-30 23:16:13,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:16:13,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-30 23:16:13,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:16:13,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:16:13,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:16:13,557 INFO L87 Difference]: Start difference. First operand 14353 states and 20192 transitions. Second operand 23 states. [2018-09-30 23:16:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:16:44,318 INFO L93 Difference]: Finished difference Result 33530 states and 47207 transitions. [2018-09-30 23:16:44,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2018-09-30 23:16:44,321 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2018-09-30 23:16:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:16:44,344 INFO L225 Difference]: With dead ends: 33530 [2018-09-30 23:16:44,344 INFO L226 Difference]: Without dead ends: 20921 [2018-09-30 23:16:44,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24345 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=10989, Invalid=54291, Unknown=0, NotChecked=0, Total=65280 [2018-09-30 23:16:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20921 states. [2018-09-30 23:16:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20921 to 6503. [2018-09-30 23:16:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6503 states. [2018-09-30 23:16:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 8696 transitions. [2018-09-30 23:16:51,234 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 8696 transitions. Word has length 49 [2018-09-30 23:16:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:16:51,234 INFO L480 AbstractCegarLoop]: Abstraction has 6503 states and 8696 transitions. [2018-09-30 23:16:51,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:16:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 8696 transitions. [2018-09-30 23:16:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:16:51,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:16:51,240 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 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] [2018-09-30 23:16:51,240 INFO L423 AbstractCegarLoop]: === Iteration 63 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:16:51,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:16:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash -18814112, now seen corresponding path program 1 times [2018-09-30 23:16:51,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:16:51,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:16:51,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:51,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:16:51,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:16:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:16:51,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:16:51,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:16:51,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:16:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:16:51,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:16:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 23:16:51,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:16:51,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2018-09-30 23:16:51,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:16:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:16:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:16:51,976 INFO L87 Difference]: Start difference. First operand 6503 states and 8696 transitions. Second operand 24 states. [2018-09-30 23:17:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:11,813 INFO L93 Difference]: Finished difference Result 15682 states and 20978 transitions. [2018-09-30 23:17:11,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:17:11,814 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2018-09-30 23:17:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:11,826 INFO L225 Difference]: With dead ends: 15682 [2018-09-30 23:17:11,826 INFO L226 Difference]: Without dead ends: 10025 [2018-09-30 23:17:11,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6873 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3678, Invalid=17202, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:17:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10025 states. [2018-09-30 23:17:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10025 to 2543. [2018-09-30 23:17:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2543 states. [2018-09-30 23:17:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3388 transitions. [2018-09-30 23:17:15,877 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3388 transitions. Word has length 52 [2018-09-30 23:17:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:15,877 INFO L480 AbstractCegarLoop]: Abstraction has 2543 states and 3388 transitions. [2018-09-30 23:17:15,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:17:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3388 transitions. [2018-09-30 23:17:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:17:15,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:15,880 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 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] [2018-09-30 23:17:15,880 INFO L423 AbstractCegarLoop]: === Iteration 64 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:15,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1721436429, now seen corresponding path program 1 times [2018-09-30 23:17:15,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:15,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:15,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:15,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:15,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-30 23:17:16,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:16,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:16,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:16,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:17:16,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:16,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2018-09-30 23:17:16,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:17:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:17:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:17:16,228 INFO L87 Difference]: Start difference. First operand 2543 states and 3388 transitions. Second operand 14 states. [2018-09-30 23:17:27,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:27,735 INFO L93 Difference]: Finished difference Result 5417 states and 7176 transitions. [2018-09-30 23:17:27,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:17:27,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-09-30 23:17:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:27,739 INFO L225 Difference]: With dead ends: 5417 [2018-09-30 23:17:27,739 INFO L226 Difference]: Without dead ends: 3652 [2018-09-30 23:17:27,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1317, Invalid=3939, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:17:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2018-09-30 23:17:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 2076. [2018-09-30 23:17:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2018-09-30 23:17:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2766 transitions. [2018-09-30 23:17:31,649 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2766 transitions. Word has length 52 [2018-09-30 23:17:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:31,650 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 2766 transitions. [2018-09-30 23:17:31,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:17:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2766 transitions. [2018-09-30 23:17:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:17:31,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:31,653 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 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] [2018-09-30 23:17:31,653 INFO L423 AbstractCegarLoop]: === Iteration 65 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:31,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:31,653 INFO L82 PathProgramCache]: Analyzing trace with hash 563603279, now seen corresponding path program 2 times [2018-09-30 23:17:31,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:31,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:31,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:31,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:31,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:17:31,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:31,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:17:31,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:17:31,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:17:31,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-30 23:17:32,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:32,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2018-09-30 23:17:32,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:17:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:17:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:17:32,307 INFO L87 Difference]: Start difference. First operand 2076 states and 2766 transitions. Second operand 31 states. [2018-09-30 23:18:06,039 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2018-09-30 23:18:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:22,140 INFO L93 Difference]: Finished difference Result 6451 states and 8848 transitions. [2018-09-30 23:18:22,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2018-09-30 23:18:22,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-09-30 23:18:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:22,146 INFO L225 Difference]: With dead ends: 6451 [2018-09-30 23:18:22,146 INFO L226 Difference]: Without dead ends: 6449 [2018-09-30 23:18:22,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 31151 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=13100, Invalid=65020, Unknown=0, NotChecked=0, Total=78120 [2018-09-30 23:18:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2018-09-30 23:18:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 3150. [2018-09-30 23:18:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3150 states. [2018-09-30 23:18:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4263 transitions. [2018-09-30 23:18:29,317 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4263 transitions. Word has length 56 [2018-09-30 23:18:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:29,317 INFO L480 AbstractCegarLoop]: Abstraction has 3150 states and 4263 transitions. [2018-09-30 23:18:29,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:18:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4263 transitions. [2018-09-30 23:18:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:18:29,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:29,321 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:18:29,321 INFO L423 AbstractCegarLoop]: === Iteration 66 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:29,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash 652955597, now seen corresponding path program 2 times [2018-09-30 23:18:29,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:29,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:29,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:29,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:29,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:18:29,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:29,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:29,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:18:29,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:18:29,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 23:18:30,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:30,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2018-09-30 23:18:30,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:18:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:18:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:18:30,074 INFO L87 Difference]: Start difference. First operand 3150 states and 4263 transitions. Second operand 29 states. [2018-09-30 23:19:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:28,206 INFO L93 Difference]: Finished difference Result 9557 states and 13204 transitions. [2018-09-30 23:19:28,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-09-30 23:19:28,207 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 23:19:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:28,215 INFO L225 Difference]: With dead ends: 9557 [2018-09-30 23:19:28,215 INFO L226 Difference]: Without dead ends: 9555 [2018-09-30 23:19:28,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22768 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=10004, Invalid=49287, Unknown=1, NotChecked=0, Total=59292 [2018-09-30 23:19:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2018-09-30 23:19:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 5182. [2018-09-30 23:19:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5182 states. [2018-09-30 23:19:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 7125 transitions. [2018-09-30 23:19:43,114 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 7125 transitions. Word has length 56 [2018-09-30 23:19:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:43,115 INFO L480 AbstractCegarLoop]: Abstraction has 5182 states and 7125 transitions. [2018-09-30 23:19:43,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:19:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 7125 transitions. [2018-09-30 23:19:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:19:43,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:43,119 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:43,120 INFO L423 AbstractCegarLoop]: === Iteration 67 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:43,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:43,120 INFO L82 PathProgramCache]: Analyzing trace with hash 288704430, now seen corresponding path program 3 times [2018-09-30 23:19:43,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:43,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:43,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:43,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:43,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:19:43,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:43,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:43,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:43,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:19:43,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:43,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-30 23:19:43,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:43,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2018-09-30 23:19:43,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:19:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:19:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:19:43,953 INFO L87 Difference]: Start difference. First operand 5182 states and 7125 transitions. Second operand 28 states. [2018-09-30 23:19:50,153 WARN L178 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-09-30 23:19:52,509 WARN L178 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2018-09-30 23:19:54,854 WARN L178 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2018-09-30 23:19:56,403 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2018-09-30 23:19:57,531 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2018-09-30 23:19:58,477 WARN L178 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2018-09-30 23:20:00,262 WARN L178 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2018-09-30 23:20:01,659 WARN L178 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2018-09-30 23:20:02,014 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2018-09-30 23:20:03,103 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2018-09-30 23:20:04,108 WARN L178 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-09-30 23:20:05,595 WARN L178 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2018-09-30 23:20:10,348 WARN L178 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2018-09-30 23:20:11,597 WARN L178 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-09-30 23:20:12,666 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2018-09-30 23:20:13,633 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2018-09-30 23:20:13,999 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 Received shutdown request... [2018-09-30 23:20:18,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:20:18,874 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:20:18,877 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:20:18,877 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:20:18 BoogieIcfgContainer [2018-09-30 23:20:18,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:20:18,878 INFO L168 Benchmark]: Toolchain (without parser) took 819525.47 ms. Allocated memory was 1.6 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-30 23:20:18,879 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:20:18,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.79 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:20:18,879 INFO L168 Benchmark]: Boogie Preprocessor took 32.52 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:20:18,879 INFO L168 Benchmark]: RCFGBuilder took 679.77 ms. Allocated memory is still 1.6 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. [2018-09-30 23:20:18,880 INFO L168 Benchmark]: TraceAbstraction took 818755.45 ms. Allocated memory was 1.6 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-30 23:20:18,882 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 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.79 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.52 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 679.77 ms. Allocated memory is still 1.6 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 818755.45 ms. Allocated memory was 1.6 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.7 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 BasicCegarLoop was constructing difference of abstraction (5182states) and FLOYD_HOARE automaton (currently 73 states, 28 states before enhancement), while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 97 known predicates. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while BasicCegarLoop was constructing difference of abstraction (5182states) and FLOYD_HOARE automaton (currently 73 states, 28 states before enhancement), while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 97 known predicates. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while BasicCegarLoop was constructing difference of abstraction (5182states) and FLOYD_HOARE automaton (currently 73 states, 28 states before enhancement), while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 97 known predicates. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while BasicCegarLoop was constructing difference of abstraction (5182states) and FLOYD_HOARE automaton (currently 73 states, 28 states before enhancement), while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 97 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 818.6s OverallTime, 67 OverallIterations, 5 TraceHistogramMax, 631.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5531 SDtfs, 16534 SDslu, 10898 SDs, 0 SdLazy, 110376 SolverSat, 25773 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 127.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7406 GetRequests, 1838 SyntacticMatches, 25 SemanticMatches, 5542 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 350981 ImplicationChecksByTransitivity, 215.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16142occurred in iteration=60, 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: 150.0s AutomataMinimizationTime, 66 MinimizatonAttempts, 128407 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 30.8s InterpolantComputationTime, 3558 NumberOfCodeBlocks, 3554 NumberOfCodeBlocksAsserted, 164 NumberOfCheckSat, 3427 ConstructedInterpolants, 109 QuantifiedInterpolants, 607379 SizeOfPredicates, 1311 NumberOfNonLiveVariables, 23592 ConjunctsInSsa, 2547 ConjunctsInUnsatCore, 131 InterpolantComputations, 9 PerfectInterpolantSequences, 636/2292 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-0-2018-09-30_23-20-18-891.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-0-2018-09-30_23-20-18-891.csv Completed graceful shutdown