java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:06:37,094 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:06:37,096 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:06:37,109 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:06:37,110 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:06:37,111 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:06:37,115 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:06:37,118 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:06:37,120 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:06:37,121 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:06:37,126 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:06:37,126 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:06:37,127 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:06:37,130 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:06:37,137 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:06:37,140 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:06:37,142 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:06:37,145 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:06:37,147 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:06:37,148 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:06:37,149 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:06:37,150 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:06:37,152 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 20:06:37,152 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 20:06:37,153 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 20:06:37,154 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 20:06:37,154 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 20:06:37,155 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 20:06:37,156 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 20:06:37,157 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 20:06:37,157 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 20:06:37,158 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-30 20:06:37,160 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 20:06:37,182 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:06:37,182 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:06:37,183 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:06:37,183 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:06:37,183 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:06:37,184 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:06:37,184 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:06:37,184 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:06:37,184 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:06:37,184 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:06:37,185 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:06:37,185 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:06:37,185 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:06:37,185 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:06:37,185 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:06:37,186 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:06:37,186 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:06:37,186 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:06:37,186 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:06:37,186 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:06:37,186 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:06:37,187 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:06:37,187 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:06:37,187 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:06:37,187 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:06:37,187 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:06:37,188 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:06:37,188 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:06:37,188 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:06:37,188 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:06:37,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:06:37,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:06:37,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:06:37,250 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:06:37,250 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:06:37,251 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl [2018-09-30 20:06:37,252 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl' [2018-09-30 20:06:37,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:06:37,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:06:37,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:06:37,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:06:37,309 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:06:37,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,348 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:06:37,348 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:06:37,349 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:06:37,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:06:37,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:06:37,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:06:37,352 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:06:37,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:06:37,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:06:37,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:06:37,380 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:06:37,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (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 20:06:37,460 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-30 20:06:37,461 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-30 20:06:37,461 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-30 20:06:37,990 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:06:37,991 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:06:37 BoogieIcfgContainer [2018-09-30 20:06:37,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:06:37,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:06:37,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:06:37,996 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:06:37,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/2) ... [2018-09-30 20:06:37,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548bead8 and model type threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:06:37, skipping insertion in model container [2018-09-30 20:06:37,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:06:37" (2/2) ... [2018-09-30 20:06:38,000 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product.bpl [2018-09-30 20:06:38,010 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:06:38,019 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 20:06:38,074 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:06:38,075 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:06:38,075 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:06:38,075 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:06:38,075 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:06:38,075 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:06:38,076 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:06:38,076 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:06:38,076 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:06:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-30 20:06:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:06:38,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:38,101 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:06:38,102 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:38,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash 28755683, now seen corresponding path program 1 times [2018-09-30 20:06:38,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:38,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:38,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:38,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:38,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:38,402 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 20:06:38,404 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:38,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:06:38,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:06:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:06:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:06:38,427 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-09-30 20:06:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:39,078 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2018-09-30 20:06:39,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:06:39,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:06:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:39,095 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:06:39,095 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:06:39,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:06:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:06:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 20:06:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:06:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2018-09-30 20:06:39,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 5 [2018-09-30 20:06:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:39,139 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2018-09-30 20:06:39,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:06:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2018-09-30 20:06:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:06:39,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:39,140 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:06:39,141 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:39,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:39,141 INFO L82 PathProgramCache]: Analyzing trace with hash 28971747, now seen corresponding path program 1 times [2018-09-30 20:06:39,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:39,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:39,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:39,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:39,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:39,189 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 20:06:39,190 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:39,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:06:39,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:06:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:06:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:06:39,193 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 5 states. [2018-09-30 20:06:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:39,516 INFO L93 Difference]: Finished difference Result 57 states and 99 transitions. [2018-09-30 20:06:39,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:06:39,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:06:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:39,519 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:06:39,519 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:06:39,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:06:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:06:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-09-30 20:06:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:06:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 63 transitions. [2018-09-30 20:06:39,530 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 63 transitions. Word has length 5 [2018-09-30 20:06:39,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:39,531 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 63 transitions. [2018-09-30 20:06:39,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:06:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 63 transitions. [2018-09-30 20:06:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:06:39,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:39,534 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:39,534 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:39,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1864688358, now seen corresponding path program 1 times [2018-09-30 20:06:39,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:39,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:39,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:39,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:39,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:39,721 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-09-30 20:06:39,857 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 20:06:39,858 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:39,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 20:06:39,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:06:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:06:39,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:06:39,860 INFO L87 Difference]: Start difference. First operand 38 states and 63 transitions. Second operand 7 states. [2018-09-30 20:06:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:40,987 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2018-09-30 20:06:40,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:06:40,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:06:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:40,989 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:06:40,989 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:06:40,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:06:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:06:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2018-09-30 20:06:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:06:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 86 transitions. [2018-09-30 20:06:41,004 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 86 transitions. Word has length 7 [2018-09-30 20:06:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:41,004 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 86 transitions. [2018-09-30 20:06:41,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:06:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 86 transitions. [2018-09-30 20:06:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:06:41,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:41,005 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 20:06:41,006 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:41,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1865765160, now seen corresponding path program 1 times [2018-09-30 20:06:41,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:41,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:41,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:41,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:41,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:41,152 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 20:06:41,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:41,153 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 20:06:41,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:41,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:41,570 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 20:06:41,603 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:06:41,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 20:06:41,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:06:41,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:06:41,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:06:41,605 INFO L87 Difference]: Start difference. First operand 51 states and 86 transitions. Second operand 9 states. [2018-09-30 20:06:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:42,526 INFO L93 Difference]: Finished difference Result 142 states and 245 transitions. [2018-09-30 20:06:42,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:06:42,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-09-30 20:06:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:42,528 INFO L225 Difference]: With dead ends: 142 [2018-09-30 20:06:42,528 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:06:42,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:06:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:06:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2018-09-30 20:06:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:06:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 120 transitions. [2018-09-30 20:06:42,546 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 120 transitions. Word has length 7 [2018-09-30 20:06:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:42,547 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 120 transitions. [2018-09-30 20:06:42,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:06:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 120 transitions. [2018-09-30 20:06:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:06:42,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:42,548 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:42,549 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:42,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 964893579, now seen corresponding path program 1 times [2018-09-30 20:06:42,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:42,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:42,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:42,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:42,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:42,715 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 20:06:42,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:42,716 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 20:06:42,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:42,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:42,770 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 20:06:42,791 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:06:42,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2018-09-30 20:06:42,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:06:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:06:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:06:42,793 INFO L87 Difference]: Start difference. First operand 73 states and 120 transitions. Second operand 11 states. [2018-09-30 20:06:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:43,593 INFO L93 Difference]: Finished difference Result 148 states and 240 transitions. [2018-09-30 20:06:43,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:06:43,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-09-30 20:06:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:43,596 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:06:43,597 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:06:43,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:06:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:06:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2018-09-30 20:06:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:06:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 119 transitions. [2018-09-30 20:06:43,614 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 119 transitions. Word has length 9 [2018-09-30 20:06:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:43,614 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 119 transitions. [2018-09-30 20:06:43,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:06:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 119 transitions. [2018-09-30 20:06:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:43,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:43,616 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:43,616 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:43,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 101966393, now seen corresponding path program 1 times [2018-09-30 20:06:43,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:43,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:43,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:43,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:43,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:43,808 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 20:06:43,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:43,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:43,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:43,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:43,924 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 20:06:43,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:43,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:06:43,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:43,953 INFO L87 Difference]: Start difference. First operand 78 states and 119 transitions. Second operand 14 states. [2018-09-30 20:06:44,220 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-30 20:06:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:44,870 INFO L93 Difference]: Finished difference Result 124 states and 193 transitions. [2018-09-30 20:06:44,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:06:44,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:06:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:44,872 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:06:44,873 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:06:44,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:06:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:06:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2018-09-30 20:06:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:06:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 173 transitions. [2018-09-30 20:06:44,892 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 173 transitions. Word has length 10 [2018-09-30 20:06:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:44,893 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 173 transitions. [2018-09-30 20:06:44,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 173 transitions. [2018-09-30 20:06:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:44,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:44,894 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:44,895 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:44,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash 103259259, now seen corresponding path program 1 times [2018-09-30 20:06:44,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:44,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:44,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:44,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:44,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:06:45,057 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:45,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 20:06:45,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:06:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:06:45,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:06:45,058 INFO L87 Difference]: Start difference. First operand 107 states and 173 transitions. Second operand 8 states. [2018-09-30 20:06:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:45,752 INFO L93 Difference]: Finished difference Result 132 states and 203 transitions. [2018-09-30 20:06:45,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:06:45,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 20:06:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:45,753 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:06:45,754 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:06:45,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:06:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:06:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2018-09-30 20:06:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:06:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 196 transitions. [2018-09-30 20:06:45,786 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 196 transitions. Word has length 10 [2018-09-30 20:06:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:45,787 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-09-30 20:06:45,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:06:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 196 transitions. [2018-09-30 20:06:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:45,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:45,792 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:45,794 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:45,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:45,795 INFO L82 PathProgramCache]: Analyzing trace with hash -176034144, now seen corresponding path program 1 times [2018-09-30 20:06:45,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:45,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:45,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:45,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:45,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:46,186 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 20:06:46,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:46,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:46,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:46,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:46,673 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 20:06:46,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:46,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 20:06:46,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:46,708 INFO L87 Difference]: Start difference. First operand 121 states and 196 transitions. Second operand 14 states. [2018-09-30 20:06:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:48,121 INFO L93 Difference]: Finished difference Result 162 states and 262 transitions. [2018-09-30 20:06:48,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:06:48,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:06:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:48,123 INFO L225 Difference]: With dead ends: 162 [2018-09-30 20:06:48,123 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:06:48,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:06:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:06:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2018-09-30 20:06:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:06:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 209 transitions. [2018-09-30 20:06:48,144 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 209 transitions. Word has length 10 [2018-09-30 20:06:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:48,146 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 209 transitions. [2018-09-30 20:06:48,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 209 transitions. [2018-09-30 20:06:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:48,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:48,148 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:48,148 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:48,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash -176034432, now seen corresponding path program 1 times [2018-09-30 20:06:48,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:48,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:48,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:48,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:48,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:48,240 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 20:06:48,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:48,240 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 20:06:48,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:48,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:48,370 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 20:06:48,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:48,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 20:06:48,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:06:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:06:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:06:48,392 INFO L87 Difference]: Start difference. First operand 129 states and 209 transitions. Second operand 13 states. [2018-09-30 20:06:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:50,245 INFO L93 Difference]: Finished difference Result 223 states and 343 transitions. [2018-09-30 20:06:50,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:06:50,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-30 20:06:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:50,250 INFO L225 Difference]: With dead ends: 223 [2018-09-30 20:06:50,250 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 20:06:50,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:06:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 20:06:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2018-09-30 20:06:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:06:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 274 transitions. [2018-09-30 20:06:50,284 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 274 transitions. Word has length 10 [2018-09-30 20:06:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:50,285 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 274 transitions. [2018-09-30 20:06:50,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:06:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 274 transitions. [2018-09-30 20:06:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:50,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:50,286 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:50,286 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:50,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -184622601, now seen corresponding path program 1 times [2018-09-30 20:06:50,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:50,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:50,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:50,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:50,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:50,430 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 20:06:50,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:50,430 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 20:06:50,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:50,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:50,529 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 20:06:50,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:50,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:06:50,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:50,555 INFO L87 Difference]: Start difference. First operand 167 states and 274 transitions. Second operand 14 states. [2018-09-30 20:06:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:51,859 INFO L93 Difference]: Finished difference Result 222 states and 351 transitions. [2018-09-30 20:06:51,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:06:51,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:06:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:51,862 INFO L225 Difference]: With dead ends: 222 [2018-09-30 20:06:51,863 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 20:06:51,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:06:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 20:06:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 181. [2018-09-30 20:06:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:06:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2018-09-30 20:06:51,892 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 10 [2018-09-30 20:06:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:51,892 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2018-09-30 20:06:51,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2018-09-30 20:06:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:51,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:51,893 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:51,893 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:51,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash -184621319, now seen corresponding path program 1 times [2018-09-30 20:06:51,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:51,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:51,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:51,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:51,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:52,071 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 20:06:52,071 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:52,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 20:06:52,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:06:52,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:06:52,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:06:52,076 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand 8 states. [2018-09-30 20:06:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:52,435 INFO L93 Difference]: Finished difference Result 203 states and 320 transitions. [2018-09-30 20:06:52,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:06:52,436 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 20:06:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:52,437 INFO L225 Difference]: With dead ends: 203 [2018-09-30 20:06:52,437 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 20:06:52,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:06:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 20:06:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2018-09-30 20:06:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 20:06:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 301 transitions. [2018-09-30 20:06:52,463 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 301 transitions. Word has length 10 [2018-09-30 20:06:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:52,464 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 301 transitions. [2018-09-30 20:06:52,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:06:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 301 transitions. [2018-09-30 20:06:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:52,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:52,465 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:52,465 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:52,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:52,466 INFO L82 PathProgramCache]: Analyzing trace with hash -973282432, now seen corresponding path program 1 times [2018-09-30 20:06:52,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:52,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:52,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:52,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:52,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:52,606 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 20:06:52,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:52,606 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 20:06:52,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:52,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:52,695 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 20:06:52,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:52,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:06:52,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:52,717 INFO L87 Difference]: Start difference. First operand 183 states and 301 transitions. Second operand 14 states. [2018-09-30 20:06:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:54,072 INFO L93 Difference]: Finished difference Result 241 states and 385 transitions. [2018-09-30 20:06:54,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:06:54,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:06:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:54,074 INFO L225 Difference]: With dead ends: 241 [2018-09-30 20:06:54,074 INFO L226 Difference]: Without dead ends: 240 [2018-09-30 20:06:54,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:06:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-09-30 20:06:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-09-30 20:06:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 20:06:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 336 transitions. [2018-09-30 20:06:54,098 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 336 transitions. Word has length 10 [2018-09-30 20:06:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:54,099 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 336 transitions. [2018-09-30 20:06:54,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 336 transitions. [2018-09-30 20:06:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:54,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:54,100 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:54,100 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:54,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash -973281662, now seen corresponding path program 1 times [2018-09-30 20:06:54,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:54,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:54,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:54,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:54,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:54,194 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 20:06:54,194 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:54,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 20:06:54,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:06:54,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:06:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:06:54,196 INFO L87 Difference]: Start difference. First operand 202 states and 336 transitions. Second operand 8 states. [2018-09-30 20:06:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:54,507 INFO L93 Difference]: Finished difference Result 220 states and 353 transitions. [2018-09-30 20:06:54,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:06:54,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 20:06:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:54,511 INFO L225 Difference]: With dead ends: 220 [2018-09-30 20:06:54,511 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 20:06:54,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:06:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 20:06:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2018-09-30 20:06:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 20:06:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 348 transitions. [2018-09-30 20:06:54,537 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 348 transitions. Word has length 10 [2018-09-30 20:06:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:54,538 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 348 transitions. [2018-09-30 20:06:54,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:06:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 348 transitions. [2018-09-30 20:06:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:54,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:54,539 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:54,539 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:54,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash -981870601, now seen corresponding path program 1 times [2018-09-30 20:06:54,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:54,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:54,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:54,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:54,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:54,639 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 20:06:54,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:54,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:54,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:54,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:54,743 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 20:06:54,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:54,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 20:06:54,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:06:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:06:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:06:54,767 INFO L87 Difference]: Start difference. First operand 210 states and 348 transitions. Second operand 13 states. [2018-09-30 20:06:55,948 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-30 20:06:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:56,428 INFO L93 Difference]: Finished difference Result 320 states and 507 transitions. [2018-09-30 20:06:56,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:06:56,429 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-30 20:06:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:56,432 INFO L225 Difference]: With dead ends: 320 [2018-09-30 20:06:56,432 INFO L226 Difference]: Without dead ends: 318 [2018-09-30 20:06:56,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:06:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-30 20:06:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2018-09-30 20:06:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 20:06:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 430 transitions. [2018-09-30 20:06:56,461 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 430 transitions. Word has length 10 [2018-09-30 20:06:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:56,461 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 430 transitions. [2018-09-30 20:06:56,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:06:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 430 transitions. [2018-09-30 20:06:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:56,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:56,462 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:56,463 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:56,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:56,463 INFO L82 PathProgramCache]: Analyzing trace with hash -981870889, now seen corresponding path program 1 times [2018-09-30 20:06:56,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:56,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:56,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:56,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:56,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:56,535 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 20:06:56,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:56,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:56,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:56,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:56,673 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 20:06:56,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:56,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 20:06:56,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:56,695 INFO L87 Difference]: Start difference. First operand 259 states and 430 transitions. Second operand 14 states. [2018-09-30 20:06:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:57,239 INFO L93 Difference]: Finished difference Result 304 states and 503 transitions. [2018-09-30 20:06:57,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:06:57,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:06:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:57,240 INFO L225 Difference]: With dead ends: 304 [2018-09-30 20:06:57,240 INFO L226 Difference]: Without dead ends: 302 [2018-09-30 20:06:57,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:06:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-09-30 20:06:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 270. [2018-09-30 20:06:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 20:06:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 448 transitions. [2018-09-30 20:06:57,277 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 448 transitions. Word has length 10 [2018-09-30 20:06:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:57,278 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 448 transitions. [2018-09-30 20:06:57,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 448 transitions. [2018-09-30 20:06:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:57,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:57,279 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:57,279 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:57,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1101306322, now seen corresponding path program 1 times [2018-09-30 20:06:57,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:57,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:57,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:57,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:57,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:57,466 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 20:06:57,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:57,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:57,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:57,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:57,544 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 20:06:57,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:57,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:06:57,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:57,567 INFO L87 Difference]: Start difference. First operand 270 states and 448 transitions. Second operand 14 states. [2018-09-30 20:06:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:58,077 INFO L93 Difference]: Finished difference Result 281 states and 455 transitions. [2018-09-30 20:06:58,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:06:58,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 20:06:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:58,079 INFO L225 Difference]: With dead ends: 281 [2018-09-30 20:06:58,079 INFO L226 Difference]: Without dead ends: 280 [2018-09-30 20:06:58,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:06:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-30 20:06:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2018-09-30 20:06:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 20:06:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 447 transitions. [2018-09-30 20:06:58,117 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 447 transitions. Word has length 10 [2018-09-30 20:06:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:58,117 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 447 transitions. [2018-09-30 20:06:58,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 447 transitions. [2018-09-30 20:06:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:58,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:58,118 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:58,118 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:58,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1102106644, now seen corresponding path program 1 times [2018-09-30 20:06:58,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:58,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:58,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:58,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:58,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:58,547 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-09-30 20:06:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:06:58,562 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:58,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 20:06:58,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:06:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:06:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:06:58,563 INFO L87 Difference]: Start difference. First operand 270 states and 447 transitions. Second operand 8 states. [2018-09-30 20:06:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:58,958 INFO L93 Difference]: Finished difference Result 286 states and 460 transitions. [2018-09-30 20:06:58,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:06:58,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 20:06:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:58,960 INFO L225 Difference]: With dead ends: 286 [2018-09-30 20:06:58,961 INFO L226 Difference]: Without dead ends: 284 [2018-09-30 20:06:58,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:06:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-30 20:06:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2018-09-30 20:06:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 20:06:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 443 transitions. [2018-09-30 20:06:59,002 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 443 transitions. Word has length 10 [2018-09-30 20:06:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:59,003 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 443 transitions. [2018-09-30 20:06:59,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:06:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 443 transitions. [2018-09-30 20:06:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:06:59,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:59,004 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:59,004 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:59,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash 240543358, now seen corresponding path program 1 times [2018-09-30 20:06:59,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:59,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:59,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:59,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:59,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:59,940 WARN L178 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-30 20:07:00,283 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 20:07:00,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:00,284 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 20:07:00,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:00,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:00,471 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 20:07:00,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:00,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-30 20:07:00,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:00,493 INFO L87 Difference]: Start difference. First operand 268 states and 443 transitions. Second operand 16 states. [2018-09-30 20:07:01,631 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-09-30 20:07:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:02,464 INFO L93 Difference]: Finished difference Result 515 states and 842 transitions. [2018-09-30 20:07:02,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:07:02,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 20:07:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:02,468 INFO L225 Difference]: With dead ends: 515 [2018-09-30 20:07:02,469 INFO L226 Difference]: Without dead ends: 513 [2018-09-30 20:07:02,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:07:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-09-30 20:07:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 338. [2018-09-30 20:07:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-09-30 20:07:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2018-09-30 20:07:02,522 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 12 [2018-09-30 20:07:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:02,522 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2018-09-30 20:07:02,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2018-09-30 20:07:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:07:02,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:02,523 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:02,523 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:02,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1525011273, now seen corresponding path program 1 times [2018-09-30 20:07:02,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:02,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:02,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:02,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,760 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 20:07:02,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:02,761 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 20:07:02,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:02,865 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 20:07:02,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:02,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-30 20:07:02,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:02,888 INFO L87 Difference]: Start difference. First operand 338 states and 568 transitions. Second operand 16 states. [2018-09-30 20:07:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:04,524 INFO L93 Difference]: Finished difference Result 631 states and 1050 transitions. [2018-09-30 20:07:04,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:07:04,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 20:07:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:04,527 INFO L225 Difference]: With dead ends: 631 [2018-09-30 20:07:04,527 INFO L226 Difference]: Without dead ends: 629 [2018-09-30 20:07:04,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:07:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-30 20:07:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-09-30 20:07:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-30 20:07:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 685 transitions. [2018-09-30 20:07:04,599 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 685 transitions. Word has length 12 [2018-09-30 20:07:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:04,599 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 685 transitions. [2018-09-30 20:07:04,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 685 transitions. [2018-09-30 20:07:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:04,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:04,600 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:04,601 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:04,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1000080215, now seen corresponding path program 1 times [2018-09-30 20:07:04,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:04,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:04,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:04,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:04,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:04,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:04,788 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 20:07:04,811 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:04,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 20:07:04,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:04,812 INFO L87 Difference]: Start difference. First operand 403 states and 685 transitions. Second operand 14 states. [2018-09-30 20:07:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:06,860 INFO L93 Difference]: Finished difference Result 1330 states and 2225 transitions. [2018-09-30 20:07:06,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:07:06,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:07:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:06,864 INFO L225 Difference]: With dead ends: 1330 [2018-09-30 20:07:06,864 INFO L226 Difference]: Without dead ends: 929 [2018-09-30 20:07:06,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:07:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2018-09-30 20:07:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 694. [2018-09-30 20:07:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2018-09-30 20:07:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1171 transitions. [2018-09-30 20:07:06,986 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1171 transitions. Word has length 13 [2018-09-30 20:07:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:06,987 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1171 transitions. [2018-09-30 20:07:06,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1171 transitions. [2018-09-30 20:07:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:06,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:06,988 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:06,988 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:06,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -86603521, now seen corresponding path program 1 times [2018-09-30 20:07:06,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:06,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:06,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:06,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:07,074 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 20:07:07,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:07,075 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 20:07:07,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:07,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:07,236 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 20:07:07,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:07,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 20:07:07,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:07,259 INFO L87 Difference]: Start difference. First operand 694 states and 1171 transitions. Second operand 14 states. [2018-09-30 20:07:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:08,499 INFO L93 Difference]: Finished difference Result 1557 states and 2604 transitions. [2018-09-30 20:07:08,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:07:08,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:07:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:08,503 INFO L225 Difference]: With dead ends: 1557 [2018-09-30 20:07:08,503 INFO L226 Difference]: Without dead ends: 864 [2018-09-30 20:07:08,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-09-30 20:07:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 741. [2018-09-30 20:07:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2018-09-30 20:07:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1247 transitions. [2018-09-30 20:07:08,639 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1247 transitions. Word has length 13 [2018-09-30 20:07:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:08,640 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 1247 transitions. [2018-09-30 20:07:08,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1247 transitions. [2018-09-30 20:07:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:08,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:08,641 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:08,641 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:08,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash -63701769, now seen corresponding path program 1 times [2018-09-30 20:07:08,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:08,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:08,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:08,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:08,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:08,749 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 20:07:08,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:08,749 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 20:07:08,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:08,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:08,901 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 20:07:08,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:08,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 20:07:08,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:08,925 INFO L87 Difference]: Start difference. First operand 741 states and 1247 transitions. Second operand 13 states. [2018-09-30 20:07:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:09,923 INFO L93 Difference]: Finished difference Result 1655 states and 2757 transitions. [2018-09-30 20:07:09,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:09,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:07:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:09,929 INFO L225 Difference]: With dead ends: 1655 [2018-09-30 20:07:09,930 INFO L226 Difference]: Without dead ends: 915 [2018-09-30 20:07:09,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-30 20:07:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 809. [2018-09-30 20:07:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-09-30 20:07:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1353 transitions. [2018-09-30 20:07:10,065 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1353 transitions. Word has length 13 [2018-09-30 20:07:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:10,065 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 1353 transitions. [2018-09-30 20:07:10,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1353 transitions. [2018-09-30 20:07:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:10,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:10,066 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:10,066 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:10,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1761298639, now seen corresponding path program 1 times [2018-09-30 20:07:10,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:10,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:10,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:10,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:10,161 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 20:07:10,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:10,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:10,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:10,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:10,206 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 20:07:10,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:10,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 20:07:10,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:07:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:07:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:07:10,228 INFO L87 Difference]: Start difference. First operand 809 states and 1353 transitions. Second operand 10 states. [2018-09-30 20:07:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:11,003 INFO L93 Difference]: Finished difference Result 939 states and 1541 transitions. [2018-09-30 20:07:11,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:07:11,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-30 20:07:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:11,007 INFO L225 Difference]: With dead ends: 939 [2018-09-30 20:07:11,007 INFO L226 Difference]: Without dead ends: 937 [2018-09-30 20:07:11,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2018-09-30 20:07:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2018-09-30 20:07:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-30 20:07:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1367 transitions. [2018-09-30 20:07:11,145 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1367 transitions. Word has length 13 [2018-09-30 20:07:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:11,145 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 1367 transitions. [2018-09-30 20:07:11,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:07:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1367 transitions. [2018-09-30 20:07:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:11,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:11,146 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:11,146 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:11,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:11,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471129, now seen corresponding path program 1 times [2018-09-30 20:07:11,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:11,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:11,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:11,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:11,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:11,229 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 20:07:11,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:11,229 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 20:07:11,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:11,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:11,550 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 20:07:11,572 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:11,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 20:07:11,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:11,573 INFO L87 Difference]: Start difference. First operand 820 states and 1367 transitions. Second operand 14 states. [2018-09-30 20:07:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:13,394 INFO L93 Difference]: Finished difference Result 2058 states and 3403 transitions. [2018-09-30 20:07:13,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:07:13,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:07:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:13,404 INFO L225 Difference]: With dead ends: 2058 [2018-09-30 20:07:13,404 INFO L226 Difference]: Without dead ends: 1239 [2018-09-30 20:07:13,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:07:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-09-30 20:07:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 899. [2018-09-30 20:07:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-09-30 20:07:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1500 transitions. [2018-09-30 20:07:13,630 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1500 transitions. Word has length 13 [2018-09-30 20:07:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:13,630 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 1500 transitions. [2018-09-30 20:07:13,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1500 transitions. [2018-09-30 20:07:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:13,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:13,632 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:13,632 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:13,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash 267374077, now seen corresponding path program 1 times [2018-09-30 20:07:13,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:13,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:13,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:13,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:13,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:14,109 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 20:07:14,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:14,109 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 20:07:14,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:14,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:14,655 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 20:07:14,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:14,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 20:07:14,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:07:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:07:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:07:14,693 INFO L87 Difference]: Start difference. First operand 899 states and 1500 transitions. Second operand 10 states. [2018-09-30 20:07:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:15,942 INFO L93 Difference]: Finished difference Result 1038 states and 1712 transitions. [2018-09-30 20:07:15,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:07:15,942 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-30 20:07:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:15,947 INFO L225 Difference]: With dead ends: 1038 [2018-09-30 20:07:15,947 INFO L226 Difference]: Without dead ends: 1036 [2018-09-30 20:07:15,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2018-09-30 20:07:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 897. [2018-09-30 20:07:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2018-09-30 20:07:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1498 transitions. [2018-09-30 20:07:16,108 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1498 transitions. Word has length 13 [2018-09-30 20:07:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:16,108 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1498 transitions. [2018-09-30 20:07:16,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:07:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1498 transitions. [2018-09-30 20:07:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:16,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:16,109 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:16,110 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:16,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash 290277111, now seen corresponding path program 1 times [2018-09-30 20:07:16,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:16,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:16,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:16,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:16,212 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 20:07:16,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:16,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:16,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:16,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:16,300 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 20:07:16,323 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:16,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 20:07:16,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:16,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:16,324 INFO L87 Difference]: Start difference. First operand 897 states and 1498 transitions. Second operand 14 states. [2018-09-30 20:07:16,594 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-30 20:07:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:18,306 INFO L93 Difference]: Finished difference Result 2193 states and 3616 transitions. [2018-09-30 20:07:18,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:07:18,306 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:07:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:18,310 INFO L225 Difference]: With dead ends: 2193 [2018-09-30 20:07:18,311 INFO L226 Difference]: Without dead ends: 1286 [2018-09-30 20:07:18,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:07:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2018-09-30 20:07:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 995. [2018-09-30 20:07:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-30 20:07:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1646 transitions. [2018-09-30 20:07:18,497 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1646 transitions. Word has length 13 [2018-09-30 20:07:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:18,498 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1646 transitions. [2018-09-30 20:07:18,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1646 transitions. [2018-09-30 20:07:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:18,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:18,498 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:18,499 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:18,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:18,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2115278289, now seen corresponding path program 1 times [2018-09-30 20:07:18,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:18,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:18,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:18,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:18,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:18,697 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 20:07:18,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:18,697 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 20:07:18,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:18,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:18,871 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 20:07:18,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:18,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 20:07:18,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:18,893 INFO L87 Difference]: Start difference. First operand 995 states and 1646 transitions. Second operand 14 states. [2018-09-30 20:07:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:20,065 INFO L93 Difference]: Finished difference Result 2165 states and 3551 transitions. [2018-09-30 20:07:20,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:07:20,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:07:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:20,070 INFO L225 Difference]: With dead ends: 2165 [2018-09-30 20:07:20,070 INFO L226 Difference]: Without dead ends: 1153 [2018-09-30 20:07:20,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2018-09-30 20:07:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1001. [2018-09-30 20:07:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2018-09-30 20:07:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1642 transitions. [2018-09-30 20:07:20,243 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1642 transitions. Word has length 13 [2018-09-30 20:07:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:20,244 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 1642 transitions. [2018-09-30 20:07:20,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1642 transitions. [2018-09-30 20:07:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:20,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:20,245 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:20,245 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:20,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2141517287, now seen corresponding path program 1 times [2018-09-30 20:07:20,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:20,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:20,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:20,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:20,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:20,313 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 20:07:20,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:20,313 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 20:07:20,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:20,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:20,431 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 20:07:20,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:20,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 20:07:20,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:20,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:20,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:20,456 INFO L87 Difference]: Start difference. First operand 1001 states and 1642 transitions. Second operand 13 states. [2018-09-30 20:07:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:21,857 INFO L93 Difference]: Finished difference Result 1397 states and 2244 transitions. [2018-09-30 20:07:21,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:21,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:07:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:21,861 INFO L225 Difference]: With dead ends: 1397 [2018-09-30 20:07:21,861 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 20:07:21,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 20:07:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 995. [2018-09-30 20:07:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-30 20:07:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1627 transitions. [2018-09-30 20:07:22,035 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1627 transitions. Word has length 13 [2018-09-30 20:07:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:22,035 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1627 transitions. [2018-09-30 20:07:22,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1627 transitions. [2018-09-30 20:07:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:22,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:22,036 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:22,036 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:22,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2129075237, now seen corresponding path program 1 times [2018-09-30 20:07:22,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:22,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:22,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:22,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:22,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:22,137 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 20:07:22,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:22,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:22,217 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 20:07:22,238 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:22,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 20:07:22,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:22,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:22,239 INFO L87 Difference]: Start difference. First operand 995 states and 1627 transitions. Second operand 14 states. [2018-09-30 20:07:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:24,711 INFO L93 Difference]: Finished difference Result 2724 states and 4397 transitions. [2018-09-30 20:07:24,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:07:24,711 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:07:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:24,717 INFO L225 Difference]: With dead ends: 2724 [2018-09-30 20:07:24,717 INFO L226 Difference]: Without dead ends: 1719 [2018-09-30 20:07:24,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:07:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2018-09-30 20:07:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1241. [2018-09-30 20:07:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2018-09-30 20:07:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2017 transitions. [2018-09-30 20:07:24,931 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2017 transitions. Word has length 13 [2018-09-30 20:07:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:24,931 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 2017 transitions. [2018-09-30 20:07:24,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2017 transitions. [2018-09-30 20:07:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:07:24,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:24,932 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:24,933 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:24,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1374164806, now seen corresponding path program 1 times [2018-09-30 20:07:24,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:24,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:24,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:24,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:24,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:25,036 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 20:07:25,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:25,037 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 20:07:25,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:25,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:25,121 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 20:07:25,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:25,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2018-09-30 20:07:25,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:25,152 INFO L87 Difference]: Start difference. First operand 1241 states and 2017 transitions. Second operand 15 states. [2018-09-30 20:07:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:26,562 INFO L93 Difference]: Finished difference Result 1442 states and 2324 transitions. [2018-09-30 20:07:26,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:07:26,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 20:07:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:26,566 INFO L225 Difference]: With dead ends: 1442 [2018-09-30 20:07:26,567 INFO L226 Difference]: Without dead ends: 1440 [2018-09-30 20:07:26,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:07:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2018-09-30 20:07:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1225. [2018-09-30 20:07:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2018-09-30 20:07:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1983 transitions. [2018-09-30 20:07:26,803 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1983 transitions. Word has length 15 [2018-09-30 20:07:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:26,803 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 1983 transitions. [2018-09-30 20:07:26,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1983 transitions. [2018-09-30 20:07:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:07:26,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:26,804 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:26,805 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:26,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:26,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1511389740, now seen corresponding path program 1 times [2018-09-30 20:07:26,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:26,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:26,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:26,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:26,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:27,510 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 20:07:27,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:27,510 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 20:07:27,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:27,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:27,613 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 20:07:27,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:27,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2018-09-30 20:07:27,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:07:27,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:07:27,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:27,639 INFO L87 Difference]: Start difference. First operand 1225 states and 1983 transitions. Second operand 12 states. [2018-09-30 20:07:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:28,644 INFO L93 Difference]: Finished difference Result 1389 states and 2225 transitions. [2018-09-30 20:07:28,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:07:28,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-09-30 20:07:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:28,649 INFO L225 Difference]: With dead ends: 1389 [2018-09-30 20:07:28,649 INFO L226 Difference]: Without dead ends: 1387 [2018-09-30 20:07:28,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:07:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2018-09-30 20:07:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1211. [2018-09-30 20:07:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-30 20:07:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1953 transitions. [2018-09-30 20:07:28,889 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1953 transitions. Word has length 15 [2018-09-30 20:07:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:28,890 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1953 transitions. [2018-09-30 20:07:28,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:07:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1953 transitions. [2018-09-30 20:07:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:28,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:28,891 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:28,891 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:28,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -593242831, now seen corresponding path program 1 times [2018-09-30 20:07:28,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:28,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:28,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:28,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:28,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:29,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:29,023 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 20:07:29,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:29,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:29,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:29,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-30 20:07:29,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:29,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:29,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:29,222 INFO L87 Difference]: Start difference. First operand 1211 states and 1953 transitions. Second operand 14 states. [2018-09-30 20:07:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:30,854 INFO L93 Difference]: Finished difference Result 1445 states and 2303 transitions. [2018-09-30 20:07:30,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:07:30,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-09-30 20:07:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:30,858 INFO L225 Difference]: With dead ends: 1445 [2018-09-30 20:07:30,859 INFO L226 Difference]: Without dead ends: 1443 [2018-09-30 20:07:30,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:07:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2018-09-30 20:07:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1205. [2018-09-30 20:07:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 20:07:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 20:07:31,127 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 20:07:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:31,127 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 20:07:31,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 20:07:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:31,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:31,128 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:31,128 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:31,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1223170690, now seen corresponding path program 1 times [2018-09-30 20:07:31,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:31,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:31,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:31,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:31,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:31,202 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 20:07:31,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:31,203 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 20:07:31,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:31,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:31,284 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 20:07:31,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:31,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 20:07:31,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:07:31,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:07:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:31,305 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 12 states. [2018-09-30 20:07:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:32,752 INFO L93 Difference]: Finished difference Result 1420 states and 2265 transitions. [2018-09-30 20:07:32,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:32,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-30 20:07:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:32,756 INFO L225 Difference]: With dead ends: 1420 [2018-09-30 20:07:32,757 INFO L226 Difference]: Without dead ends: 1418 [2018-09-30 20:07:32,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:07:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-09-30 20:07:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1213. [2018-09-30 20:07:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2018-09-30 20:07:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1951 transitions. [2018-09-30 20:07:33,004 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1951 transitions. Word has length 16 [2018-09-30 20:07:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:33,004 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 1951 transitions. [2018-09-30 20:07:33,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:07:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1951 transitions. [2018-09-30 20:07:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:33,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:33,005 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:33,005 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:33,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash -767609008, now seen corresponding path program 2 times [2018-09-30 20:07:33,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:33,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:33,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:33,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:33,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:33,092 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 20:07:33,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:33,093 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 20:07:33,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:33,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:33,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:33,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:33,166 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 20:07:33,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:33,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 20:07:33,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:07:33,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:07:33,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:33,188 INFO L87 Difference]: Start difference. First operand 1213 states and 1951 transitions. Second operand 11 states. [2018-09-30 20:07:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:34,074 INFO L93 Difference]: Finished difference Result 1334 states and 2129 transitions. [2018-09-30 20:07:34,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:07:34,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-30 20:07:34,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:34,079 INFO L225 Difference]: With dead ends: 1334 [2018-09-30 20:07:34,079 INFO L226 Difference]: Without dead ends: 1332 [2018-09-30 20:07:34,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:07:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2018-09-30 20:07:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1205. [2018-09-30 20:07:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 20:07:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 20:07:34,318 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 20:07:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:34,318 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 20:07:34,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:07:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 20:07:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:34,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:34,319 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:34,319 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:34,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1823106549, now seen corresponding path program 1 times [2018-09-30 20:07:34,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:34,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:34,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:34,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:34,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:34,802 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 20:07:34,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:34,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:34,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:34,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:34,876 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 20:07:34,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:34,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 20:07:34,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:07:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:07:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:34,898 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 11 states. [2018-09-30 20:07:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:35,749 INFO L93 Difference]: Finished difference Result 1330 states and 2118 transitions. [2018-09-30 20:07:35,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:07:35,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-30 20:07:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:35,754 INFO L225 Difference]: With dead ends: 1330 [2018-09-30 20:07:35,755 INFO L226 Difference]: Without dead ends: 1328 [2018-09-30 20:07:35,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:07:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2018-09-30 20:07:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1211. [2018-09-30 20:07:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-30 20:07:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1948 transitions. [2018-09-30 20:07:36,012 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1948 transitions. Word has length 16 [2018-09-30 20:07:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:36,012 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1948 transitions. [2018-09-30 20:07:36,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:07:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1948 transitions. [2018-09-30 20:07:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:36,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:36,013 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:36,014 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:36,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:36,014 INFO L82 PathProgramCache]: Analyzing trace with hash 481081049, now seen corresponding path program 2 times [2018-09-30 20:07:36,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:36,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:36,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:36,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:36,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:36,105 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 20:07:36,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:36,106 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 20:07:36,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:36,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:36,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:36,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:36,255 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 20:07:36,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:36,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 20:07:36,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:07:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:07:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:36,276 INFO L87 Difference]: Start difference. First operand 1211 states and 1948 transitions. Second operand 12 states. [2018-09-30 20:07:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:37,555 INFO L93 Difference]: Finished difference Result 1430 states and 2273 transitions. [2018-09-30 20:07:37,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:37,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-30 20:07:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:37,560 INFO L225 Difference]: With dead ends: 1430 [2018-09-30 20:07:37,561 INFO L226 Difference]: Without dead ends: 1428 [2018-09-30 20:07:37,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:07:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2018-09-30 20:07:37,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1205. [2018-09-30 20:07:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 20:07:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 20:07:37,816 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 20:07:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:37,817 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 20:07:37,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:07:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 20:07:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:37,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:37,818 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:37,818 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:37,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:37,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1936399254, now seen corresponding path program 1 times [2018-09-30 20:07:37,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:37,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:37,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:37,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:37,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:38,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:38,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:38,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:38,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:38,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:38,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-09-30 20:07:38,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:38,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:38,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:38,798 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 13 states. [2018-09-30 20:07:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:40,695 INFO L93 Difference]: Finished difference Result 1432 states and 2278 transitions. [2018-09-30 20:07:40,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:07:40,696 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-09-30 20:07:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:40,700 INFO L225 Difference]: With dead ends: 1432 [2018-09-30 20:07:40,700 INFO L226 Difference]: Without dead ends: 1430 [2018-09-30 20:07:40,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:07:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2018-09-30 20:07:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1199. [2018-09-30 20:07:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2018-09-30 20:07:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1923 transitions. [2018-09-30 20:07:40,970 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1923 transitions. Word has length 16 [2018-09-30 20:07:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:40,970 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 1923 transitions. [2018-09-30 20:07:40,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1923 transitions. [2018-09-30 20:07:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:40,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:40,972 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 20:07:40,972 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:40,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1085218294, now seen corresponding path program 1 times [2018-09-30 20:07:40,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:40,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:40,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:40,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:40,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:41,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:41,106 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 20:07:41,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:41,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:41,220 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:41,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2018-09-30 20:07:41,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:07:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:07:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:07:41,221 INFO L87 Difference]: Start difference. First operand 1199 states and 1923 transitions. Second operand 17 states. [2018-09-30 20:07:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:43,790 INFO L93 Difference]: Finished difference Result 1695 states and 2653 transitions. [2018-09-30 20:07:43,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:07:43,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-30 20:07:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:43,793 INFO L225 Difference]: With dead ends: 1695 [2018-09-30 20:07:43,793 INFO L226 Difference]: Without dead ends: 1376 [2018-09-30 20:07:43,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:07:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2018-09-30 20:07:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1028. [2018-09-30 20:07:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-30 20:07:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1643 transitions. [2018-09-30 20:07:44,025 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1643 transitions. Word has length 18 [2018-09-30 20:07:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:44,025 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1643 transitions. [2018-09-30 20:07:44,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:07:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1643 transitions. [2018-09-30 20:07:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:44,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:44,027 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 20:07:44,027 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:44,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1597439053, now seen corresponding path program 1 times [2018-09-30 20:07:44,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:44,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:44,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:44,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:44,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:44,277 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 20:07:44,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:44,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:44,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:44,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:44,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:44,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 20:07:44,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:44,490 INFO L87 Difference]: Start difference. First operand 1028 states and 1643 transitions. Second operand 16 states. [2018-09-30 20:07:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:46,554 INFO L93 Difference]: Finished difference Result 1514 states and 2354 transitions. [2018-09-30 20:07:46,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:07:46,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 20:07:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:46,559 INFO L225 Difference]: With dead ends: 1514 [2018-09-30 20:07:46,559 INFO L226 Difference]: Without dead ends: 1219 [2018-09-30 20:07:46,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:07:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2018-09-30 20:07:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1024. [2018-09-30 20:07:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-09-30 20:07:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1632 transitions. [2018-09-30 20:07:46,968 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1632 transitions. Word has length 18 [2018-09-30 20:07:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:46,968 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1632 transitions. [2018-09-30 20:07:46,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1632 transitions. [2018-09-30 20:07:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:46,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:46,970 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:46,970 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:46,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:46,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1672170852, now seen corresponding path program 1 times [2018-09-30 20:07:46,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:46,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:46,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:46,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:46,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:47,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:47,452 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 20:07:47,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:47,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:47,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:47,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-09-30 20:07:47,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:47,584 INFO L87 Difference]: Start difference. First operand 1024 states and 1632 transitions. Second operand 16 states. [2018-09-30 20:07:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:49,277 INFO L93 Difference]: Finished difference Result 2556 states and 4045 transitions. [2018-09-30 20:07:49,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:07:49,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 20:07:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:49,280 INFO L225 Difference]: With dead ends: 2556 [2018-09-30 20:07:49,280 INFO L226 Difference]: Without dead ends: 1529 [2018-09-30 20:07:49,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-30 20:07:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1073. [2018-09-30 20:07:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-09-30 20:07:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1703 transitions. [2018-09-30 20:07:49,529 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1703 transitions. Word has length 18 [2018-09-30 20:07:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:49,529 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1703 transitions. [2018-09-30 20:07:49,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1703 transitions. [2018-09-30 20:07:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:49,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:49,530 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:49,530 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:49,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:49,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1136854538, now seen corresponding path program 1 times [2018-09-30 20:07:49,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:49,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:49,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:49,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:49,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:49,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:49,697 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 20:07:49,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:49,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:49,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:49,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 20:07:49,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:49,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:49,808 INFO L87 Difference]: Start difference. First operand 1073 states and 1703 transitions. Second operand 15 states. [2018-09-30 20:07:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:51,410 INFO L93 Difference]: Finished difference Result 1546 states and 2389 transitions. [2018-09-30 20:07:51,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:07:51,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-30 20:07:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:51,413 INFO L225 Difference]: With dead ends: 1546 [2018-09-30 20:07:51,413 INFO L226 Difference]: Without dead ends: 1291 [2018-09-30 20:07:51,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:07:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2018-09-30 20:07:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1056. [2018-09-30 20:07:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2018-09-30 20:07:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1674 transitions. [2018-09-30 20:07:51,702 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1674 transitions. Word has length 18 [2018-09-30 20:07:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:51,703 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 1674 transitions. [2018-09-30 20:07:51,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1674 transitions. [2018-09-30 20:07:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:51,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:51,704 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:51,704 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:51,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash 975863549, now seen corresponding path program 1 times [2018-09-30 20:07:51,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:51,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:51,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:51,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:51,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:51,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:51,768 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 20:07:51,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:51,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:51,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:51,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:07:51,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:07:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:07:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:07:51,814 INFO L87 Difference]: Start difference. First operand 1056 states and 1674 transitions. Second operand 7 states. [2018-09-30 20:07:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:52,462 INFO L93 Difference]: Finished difference Result 1635 states and 2515 transitions. [2018-09-30 20:07:52,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:07:52,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-09-30 20:07:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:52,465 INFO L225 Difference]: With dead ends: 1635 [2018-09-30 20:07:52,465 INFO L226 Difference]: Without dead ends: 1494 [2018-09-30 20:07:52,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2018-09-30 20:07:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1094. [2018-09-30 20:07:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2018-09-30 20:07:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1728 transitions. [2018-09-30 20:07:52,844 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1728 transitions. Word has length 18 [2018-09-30 20:07:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:52,844 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1728 transitions. [2018-09-30 20:07:52,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:07:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1728 transitions. [2018-09-30 20:07:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:07:52,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:52,845 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:07:52,845 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:52,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1152261854, now seen corresponding path program 1 times [2018-09-30 20:07:52,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:52,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:52,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:52,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:52,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:52,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:52,973 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 20:07:52,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:52,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:53,064 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 20:07:53,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:53,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2018-09-30 20:07:53,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:07:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:07:53,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:07:53,086 INFO L87 Difference]: Start difference. First operand 1094 states and 1728 transitions. Second operand 17 states. [2018-09-30 20:07:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:56,618 INFO L93 Difference]: Finished difference Result 2230 states and 3534 transitions. [2018-09-30 20:07:56,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:07:56,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-09-30 20:07:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:56,624 INFO L225 Difference]: With dead ends: 2230 [2018-09-30 20:07:56,624 INFO L226 Difference]: Without dead ends: 2180 [2018-09-30 20:07:56,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1477, Invalid=4529, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:07:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2018-09-30 20:07:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1150. [2018-09-30 20:07:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2018-09-30 20:07:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1853 transitions. [2018-09-30 20:07:57,016 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1853 transitions. Word has length 20 [2018-09-30 20:07:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:57,016 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 1853 transitions. [2018-09-30 20:07:57,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:07:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1853 transitions. [2018-09-30 20:07:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:07:57,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:57,017 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:57,017 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:57,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash -79326665, now seen corresponding path program 1 times [2018-09-30 20:07:57,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:57,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:57,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:57,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:57,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:57,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:57,111 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 20:07:57,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:57,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:57,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:57,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:07:57,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:07:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:07:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:07:57,154 INFO L87 Difference]: Start difference. First operand 1150 states and 1853 transitions. Second operand 7 states. [2018-09-30 20:07:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:57,679 INFO L93 Difference]: Finished difference Result 1760 states and 2751 transitions. [2018-09-30 20:07:57,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:07:57,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-09-30 20:07:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:57,682 INFO L225 Difference]: With dead ends: 1760 [2018-09-30 20:07:57,683 INFO L226 Difference]: Without dead ends: 1507 [2018-09-30 20:07:57,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:07:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-30 20:07:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1026. [2018-09-30 20:07:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2018-09-30 20:07:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1655 transitions. [2018-09-30 20:07:57,986 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1655 transitions. Word has length 20 [2018-09-30 20:07:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:57,986 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 1655 transitions. [2018-09-30 20:07:57,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:07:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1655 transitions. [2018-09-30 20:07:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:07:57,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:57,987 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:07:57,987 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:57,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -79325383, now seen corresponding path program 1 times [2018-09-30 20:07:57,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:57,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:57,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:57,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:57,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:58,086 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 20:07:58,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:58,087 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 20:07:58,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:58,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:58,193 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 20:07:58,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:58,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2018-09-30 20:07:58,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:58,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:58,215 INFO L87 Difference]: Start difference. First operand 1026 states and 1655 transitions. Second operand 13 states. [2018-09-30 20:08:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:00,358 INFO L93 Difference]: Finished difference Result 1878 states and 3019 transitions. [2018-09-30 20:08:00,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:08:00,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-09-30 20:08:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:00,360 INFO L225 Difference]: With dead ends: 1878 [2018-09-30 20:08:00,360 INFO L226 Difference]: Without dead ends: 1729 [2018-09-30 20:08:00,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:08:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-09-30 20:08:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1013. [2018-09-30 20:08:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2018-09-30 20:08:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1646 transitions. [2018-09-30 20:08:00,694 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1646 transitions. Word has length 20 [2018-09-30 20:08:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:00,694 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 1646 transitions. [2018-09-30 20:08:00,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:08:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1646 transitions. [2018-09-30 20:08:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:00,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:00,695 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:00,695 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:00,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:00,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1614386347, now seen corresponding path program 1 times [2018-09-30 20:08:00,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:00,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:00,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:00,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:00,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:00,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:00,820 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 20:08:00,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:00,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:01,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:01,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 20:08:01,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:08:01,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:08:01,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:08:01,011 INFO L87 Difference]: Start difference. First operand 1013 states and 1646 transitions. Second operand 20 states. [2018-09-30 20:08:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:04,511 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2018-09-30 20:08:04,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:08:04,511 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 20:08:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:04,513 INFO L225 Difference]: With dead ends: 2738 [2018-09-30 20:08:04,513 INFO L226 Difference]: Without dead ends: 1726 [2018-09-30 20:08:04,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1197, Invalid=6813, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:08:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2018-09-30 20:08:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1481. [2018-09-30 20:08:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2018-09-30 20:08:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2418 transitions. [2018-09-30 20:08:04,886 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2418 transitions. Word has length 21 [2018-09-30 20:08:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:04,886 INFO L480 AbstractCegarLoop]: Abstraction has 1481 states and 2418 transitions. [2018-09-30 20:08:04,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:08:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2418 transitions. [2018-09-30 20:08:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:04,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:04,887 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:04,887 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:04,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1615679213, now seen corresponding path program 1 times [2018-09-30 20:08:04,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:04,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:04,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:04,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:04,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:05,014 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 20:08:05,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:05,015 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 20:08:05,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:05,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:05,137 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 20:08:05,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:05,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 20:08:05,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:08:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:08:05,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:08:05,158 INFO L87 Difference]: Start difference. First operand 1481 states and 2418 transitions. Second operand 18 states. [2018-09-30 20:08:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:09,237 INFO L93 Difference]: Finished difference Result 2759 states and 4491 transitions. [2018-09-30 20:08:09,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:08:09,237 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 20:08:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:09,240 INFO L225 Difference]: With dead ends: 2759 [2018-09-30 20:08:09,240 INFO L226 Difference]: Without dead ends: 2757 [2018-09-30 20:08:09,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=899, Invalid=4503, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:08:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-09-30 20:08:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1886. [2018-09-30 20:08:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2018-09-30 20:08:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3096 transitions. [2018-09-30 20:08:09,660 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3096 transitions. Word has length 21 [2018-09-30 20:08:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:09,660 INFO L480 AbstractCegarLoop]: Abstraction has 1886 states and 3096 transitions. [2018-09-30 20:08:09,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:08:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3096 transitions. [2018-09-30 20:08:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:09,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:09,661 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:09,661 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:09,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:09,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1336385522, now seen corresponding path program 1 times [2018-09-30 20:08:09,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:09,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:09,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:09,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:09,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:09,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:09,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:08:09,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:09,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:10,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:10,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-30 20:08:10,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:08:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:08:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:08:10,016 INFO L87 Difference]: Start difference. First operand 1886 states and 3096 transitions. Second operand 16 states. [2018-09-30 20:08:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:13,478 INFO L93 Difference]: Finished difference Result 2657 states and 4320 transitions. [2018-09-30 20:08:13,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:08:13,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 20:08:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:13,481 INFO L225 Difference]: With dead ends: 2657 [2018-09-30 20:08:13,481 INFO L226 Difference]: Without dead ends: 2655 [2018-09-30 20:08:13,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:08:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2018-09-30 20:08:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1726. [2018-09-30 20:08:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-09-30 20:08:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2827 transitions. [2018-09-30 20:08:13,938 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2827 transitions. Word has length 21 [2018-09-30 20:08:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:13,938 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2827 transitions. [2018-09-30 20:08:13,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:08:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2827 transitions. [2018-09-30 20:08:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:13,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:13,939 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:13,939 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:13,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:13,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1327798635, now seen corresponding path program 1 times [2018-09-30 20:08:13,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:13,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:13,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:13,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:13,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:14,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:14,040 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 20:08:14,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:14,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:14,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:14,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-30 20:08:14,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:08:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:08:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:08:14,221 INFO L87 Difference]: Start difference. First operand 1726 states and 2827 transitions. Second operand 17 states. [2018-09-30 20:08:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:18,235 INFO L93 Difference]: Finished difference Result 2434 states and 3937 transitions. [2018-09-30 20:08:18,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:08:18,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-30 20:08:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:18,238 INFO L225 Difference]: With dead ends: 2434 [2018-09-30 20:08:18,238 INFO L226 Difference]: Without dead ends: 2432 [2018-09-30 20:08:18,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=632, Invalid=3150, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:08:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2018-09-30 20:08:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1872. [2018-09-30 20:08:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2018-09-30 20:08:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3060 transitions. [2018-09-30 20:08:19,136 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3060 transitions. Word has length 21 [2018-09-30 20:08:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:19,136 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 3060 transitions. [2018-09-30 20:08:19,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:08:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3060 transitions. [2018-09-30 20:08:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:19,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:19,138 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:19,138 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:19,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:19,138 INFO L82 PathProgramCache]: Analyzing trace with hash 133649308, now seen corresponding path program 2 times [2018-09-30 20:08:19,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:19,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:19,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:19,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:19,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:20,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:20,370 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 20:08:20,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:20,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:20,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:20,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:08:20,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:20,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 20:08:20,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:08:20,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:08:20,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:08:20,474 INFO L87 Difference]: Start difference. First operand 1872 states and 3060 transitions. Second operand 16 states. [2018-09-30 20:08:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:23,270 INFO L93 Difference]: Finished difference Result 2526 states and 4072 transitions. [2018-09-30 20:08:23,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:08:23,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 20:08:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:23,272 INFO L225 Difference]: With dead ends: 2526 [2018-09-30 20:08:23,273 INFO L226 Difference]: Without dead ends: 2334 [2018-09-30 20:08:23,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:08:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2018-09-30 20:08:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2001. [2018-09-30 20:08:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2001 states. [2018-09-30 20:08:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 3219 transitions. [2018-09-30 20:08:23,802 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 3219 transitions. Word has length 21 [2018-09-30 20:08:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:23,802 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 3219 transitions. [2018-09-30 20:08:23,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:08:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 3219 transitions. [2018-09-30 20:08:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:23,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:23,803 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:23,803 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:23,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:23,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1958649716, now seen corresponding path program 1 times [2018-09-30 20:08:23,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:23,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:23,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:23,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:23,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:23,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:23,907 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 20:08:23,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:23,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:24,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:24,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-30 20:08:24,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:08:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:08:24,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:08:24,381 INFO L87 Difference]: Start difference. First operand 2001 states and 3219 transitions. Second operand 18 states. [2018-09-30 20:08:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:29,899 INFO L93 Difference]: Finished difference Result 2607 states and 4131 transitions. [2018-09-30 20:08:29,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:08:29,899 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 20:08:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:29,902 INFO L225 Difference]: With dead ends: 2607 [2018-09-30 20:08:29,902 INFO L226 Difference]: Without dead ends: 2605 [2018-09-30 20:08:29,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1198, Invalid=4808, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:08:29,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2018-09-30 20:08:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1559. [2018-09-30 20:08:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2018-09-30 20:08:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2486 transitions. [2018-09-30 20:08:30,370 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2486 transitions. Word has length 21 [2018-09-30 20:08:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:30,370 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 2486 transitions. [2018-09-30 20:08:30,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:08:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2486 transitions. [2018-09-30 20:08:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:30,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:30,371 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:30,371 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:30,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:30,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1950062829, now seen corresponding path program 1 times [2018-09-30 20:08:30,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:30,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:30,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:30,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:30,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:31,187 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 20:08:31,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:31,188 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 20:08:31,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:31,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:31,333 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 20:08:31,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:31,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 20:08:31,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:08:31,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:08:31,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:08:31,356 INFO L87 Difference]: Start difference. First operand 1559 states and 2486 transitions. Second operand 18 states. [2018-09-30 20:08:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:36,531 INFO L93 Difference]: Finished difference Result 2107 states and 3306 transitions. [2018-09-30 20:08:36,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:08:36,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 20:08:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:36,533 INFO L225 Difference]: With dead ends: 2107 [2018-09-30 20:08:36,533 INFO L226 Difference]: Without dead ends: 2105 [2018-09-30 20:08:36,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:08:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2018-09-30 20:08:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1432. [2018-09-30 20:08:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-09-30 20:08:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2283 transitions. [2018-09-30 20:08:36,935 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2283 transitions. Word has length 21 [2018-09-30 20:08:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:36,935 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 2283 transitions. [2018-09-30 20:08:36,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:08:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2283 transitions. [2018-09-30 20:08:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:36,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:36,936 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:36,936 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:36,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 830618954, now seen corresponding path program 2 times [2018-09-30 20:08:36,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:36,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:36,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:36,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:36,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:37,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:37,042 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 20:08:37,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:37,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:37,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:37,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:08:37,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:37,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-30 20:08:37,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:08:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:08:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:08:37,142 INFO L87 Difference]: Start difference. First operand 1432 states and 2283 transitions. Second operand 15 states. [2018-09-30 20:08:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:40,152 INFO L93 Difference]: Finished difference Result 1886 states and 2991 transitions. [2018-09-30 20:08:40,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:08:40,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 20:08:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:40,154 INFO L225 Difference]: With dead ends: 1886 [2018-09-30 20:08:40,154 INFO L226 Difference]: Without dead ends: 1884 [2018-09-30 20:08:40,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=644, Invalid=3138, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:08:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-30 20:08:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1404. [2018-09-30 20:08:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2018-09-30 20:08:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2237 transitions. [2018-09-30 20:08:40,603 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2237 transitions. Word has length 21 [2018-09-30 20:08:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:40,603 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2237 transitions. [2018-09-30 20:08:40,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:08:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2237 transitions. [2018-09-30 20:08:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:40,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:40,604 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:40,604 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:40,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash 822030785, now seen corresponding path program 1 times [2018-09-30 20:08:40,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:40,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:40,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:40,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:40,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:40,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:40,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:08:40,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:40,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:41,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:41,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 20:08:41,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:08:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:08:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:08:41,085 INFO L87 Difference]: Start difference. First operand 1404 states and 2237 transitions. Second operand 20 states. [2018-09-30 20:08:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:46,007 INFO L93 Difference]: Finished difference Result 2676 states and 4218 transitions. [2018-09-30 20:08:46,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:08:46,007 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 20:08:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:46,009 INFO L225 Difference]: With dead ends: 2676 [2018-09-30 20:08:46,009 INFO L226 Difference]: Without dead ends: 1637 [2018-09-30 20:08:46,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1444, Invalid=7486, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:08:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2018-09-30 20:08:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1391. [2018-09-30 20:08:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2018-09-30 20:08:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2209 transitions. [2018-09-30 20:08:46,446 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2209 transitions. Word has length 21 [2018-09-30 20:08:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:46,446 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2209 transitions. [2018-09-30 20:08:46,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:08:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2209 transitions. [2018-09-30 20:08:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:46,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:46,447 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:46,447 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:46,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash 822032067, now seen corresponding path program 2 times [2018-09-30 20:08:46,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:46,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:46,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:46,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:46,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:46,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:46,540 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 20:08:46,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:46,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:46,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:46,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:08:46,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:46,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2018-09-30 20:08:46,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:08:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:08:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:08:46,704 INFO L87 Difference]: Start difference. First operand 1391 states and 2209 transitions. Second operand 18 states. [2018-09-30 20:08:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:51,105 INFO L93 Difference]: Finished difference Result 2169 states and 3390 transitions. [2018-09-30 20:08:51,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:08:51,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 20:08:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:51,107 INFO L225 Difference]: With dead ends: 2169 [2018-09-30 20:08:51,107 INFO L226 Difference]: Without dead ends: 2167 [2018-09-30 20:08:51,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1116, Invalid=5856, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:08:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2018-09-30 20:08:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1375. [2018-09-30 20:08:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-09-30 20:08:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2186 transitions. [2018-09-30 20:08:51,624 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2186 transitions. Word has length 21 [2018-09-30 20:08:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:51,624 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2186 transitions. [2018-09-30 20:08:51,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:08:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2186 transitions. [2018-09-30 20:08:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:51,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:51,625 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:51,625 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:51,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash -97849607, now seen corresponding path program 1 times [2018-09-30 20:08:51,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:51,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:51,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:51,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:51,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:51,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:51,741 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 20:08:51,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:51,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:51,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:51,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 20:08:51,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:08:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:08:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:08:51,941 INFO L87 Difference]: Start difference. First operand 1375 states and 2186 transitions. Second operand 19 states. [2018-09-30 20:08:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:54,998 INFO L93 Difference]: Finished difference Result 3096 states and 4913 transitions. [2018-09-30 20:08:54,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:08:54,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 20:08:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:55,000 INFO L225 Difference]: With dead ends: 3096 [2018-09-30 20:08:55,000 INFO L226 Difference]: Without dead ends: 1770 [2018-09-30 20:08:55,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=571, Invalid=2735, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:08:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2018-09-30 20:08:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1381. [2018-09-30 20:08:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2018-09-30 20:08:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2193 transitions. [2018-09-30 20:08:55,472 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2193 transitions. Word has length 21 [2018-09-30 20:08:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:55,473 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2193 transitions. [2018-09-30 20:08:55,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:08:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2193 transitions. [2018-09-30 20:08:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:55,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:55,473 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:55,474 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:55,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash 437466707, now seen corresponding path program 1 times [2018-09-30 20:08:55,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:55,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:55,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:55,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:55,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:55,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:55,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:08:55,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:55,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:55,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:55,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-30 20:08:55,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:08:55,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:08:55,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:08:55,649 INFO L87 Difference]: Start difference. First operand 1381 states and 2193 transitions. Second operand 13 states. [2018-09-30 20:08:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:57,662 INFO L93 Difference]: Finished difference Result 1858 states and 2972 transitions. [2018-09-30 20:08:57,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:08:57,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-30 20:08:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:57,664 INFO L225 Difference]: With dead ends: 1858 [2018-09-30 20:08:57,664 INFO L226 Difference]: Without dead ends: 1856 [2018-09-30 20:08:57,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:08:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2018-09-30 20:08:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1551. [2018-09-30 20:08:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2018-09-30 20:08:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2486 transitions. [2018-09-30 20:08:58,218 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2486 transitions. Word has length 21 [2018-09-30 20:08:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:58,218 INFO L480 AbstractCegarLoop]: Abstraction has 1551 states and 2486 transitions. [2018-09-30 20:08:58,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:08:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2486 transitions. [2018-09-30 20:08:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:08:58,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:58,219 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:58,219 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:58,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2130898623, now seen corresponding path program 2 times [2018-09-30 20:08:58,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:58,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:58,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:58,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:58,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:58,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:58,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:08:58,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:58,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:58,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:58,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:08:58,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:58,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-30 20:08:58,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:08:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:08:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:08:58,543 INFO L87 Difference]: Start difference. First operand 1551 states and 2486 transitions. Second operand 19 states. [2018-09-30 20:09:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:02,168 INFO L93 Difference]: Finished difference Result 1901 states and 3071 transitions. [2018-09-30 20:09:02,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:09:02,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 20:09:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:02,170 INFO L225 Difference]: With dead ends: 1901 [2018-09-30 20:09:02,170 INFO L226 Difference]: Without dead ends: 1899 [2018-09-30 20:09:02,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=509, Invalid=3031, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:09:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2018-09-30 20:09:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1583. [2018-09-30 20:09:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2018-09-30 20:09:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2523 transitions. [2018-09-30 20:09:02,740 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2523 transitions. Word has length 21 [2018-09-30 20:09:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:02,740 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 2523 transitions. [2018-09-30 20:09:02,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:09:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2523 transitions. [2018-09-30 20:09:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:09:02,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:02,741 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:02,741 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:02,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2139486792, now seen corresponding path program 1 times [2018-09-30 20:09:02,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:02,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:02,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:02,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:02,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:02,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:02,831 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 20:09:02,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:02,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:09:02,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:02,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-30 20:09:02,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:09:02,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:09:02,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:09:02,942 INFO L87 Difference]: Start difference. First operand 1583 states and 2523 transitions. Second operand 13 states. [2018-09-30 20:09:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:05,685 INFO L93 Difference]: Finished difference Result 2207 states and 3564 transitions. [2018-09-30 20:09:05,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:09:05,686 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-30 20:09:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:05,688 INFO L225 Difference]: With dead ends: 2207 [2018-09-30 20:09:05,688 INFO L226 Difference]: Without dead ends: 2205 [2018-09-30 20:09:05,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:09:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2018-09-30 20:09:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1741. [2018-09-30 20:09:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2018-09-30 20:09:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2777 transitions. [2018-09-30 20:09:06,277 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2777 transitions. Word has length 21 [2018-09-30 20:09:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:06,277 INFO L480 AbstractCegarLoop]: Abstraction has 1741 states and 2777 transitions. [2018-09-30 20:09:06,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:09:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2777 transitions. [2018-09-30 20:09:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:09:06,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:06,278 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:06,278 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:06,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1673653662, now seen corresponding path program 2 times [2018-09-30 20:09:06,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:06,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:06,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:06,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:06,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:06,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:06,380 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 20:09:06,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:06,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:06,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:06,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:06,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:06,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-30 20:09:06,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:09:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:09:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:09:06,562 INFO L87 Difference]: Start difference. First operand 1741 states and 2777 transitions. Second operand 15 states. [2018-09-30 20:09:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:10,741 INFO L93 Difference]: Finished difference Result 3370 states and 5507 transitions. [2018-09-30 20:09:10,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:09:10,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 20:09:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:10,744 INFO L225 Difference]: With dead ends: 3370 [2018-09-30 20:09:10,745 INFO L226 Difference]: Without dead ends: 3368 [2018-09-30 20:09:10,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2941, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:09:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2018-09-30 20:09:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2044. [2018-09-30 20:09:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-09-30 20:09:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3284 transitions. [2018-09-30 20:09:11,387 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3284 transitions. Word has length 21 [2018-09-30 20:09:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:11,387 INFO L480 AbstractCegarLoop]: Abstraction has 2044 states and 3284 transitions. [2018-09-30 20:09:11,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:09:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3284 transitions. [2018-09-30 20:09:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:09:11,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:11,388 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:11,388 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:11,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 212422270, now seen corresponding path program 2 times [2018-09-30 20:09:11,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:11,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:11,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 20:09:11,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:11,458 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 20:09:11,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:11,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:11,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:11,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:09:11,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:11,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-30 20:09:11,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:09:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:09:11,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:09:11,577 INFO L87 Difference]: Start difference. First operand 2044 states and 3284 transitions. Second operand 12 states. [2018-09-30 20:09:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:14,202 INFO L93 Difference]: Finished difference Result 5216 states and 8321 transitions. [2018-09-30 20:09:14,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:09:14,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-09-30 20:09:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:14,205 INFO L225 Difference]: With dead ends: 5216 [2018-09-30 20:09:14,206 INFO L226 Difference]: Without dead ends: 3229 [2018-09-30 20:09:14,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:09:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2018-09-30 20:09:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2942. [2018-09-30 20:09:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2942 states. [2018-09-30 20:09:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4622 transitions. [2018-09-30 20:09:15,261 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4622 transitions. Word has length 21 [2018-09-30 20:09:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:15,261 INFO L480 AbstractCegarLoop]: Abstraction has 2942 states and 4622 transitions. [2018-09-30 20:09:15,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:09:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4622 transitions. [2018-09-30 20:09:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:09:15,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:15,263 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:15,263 INFO L423 AbstractCegarLoop]: === Iteration 62 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:15,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1977173104, now seen corresponding path program 1 times [2018-09-30 20:09:15,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:15,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:15,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:15,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:15,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:15,402 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 20:09:15,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:15,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:09:15,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:15,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:15,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:15,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 20:09:15,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:09:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:09:15,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:09:15,613 INFO L87 Difference]: Start difference. First operand 2942 states and 4622 transitions. Second operand 22 states. [2018-09-30 20:09:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:24,129 INFO L93 Difference]: Finished difference Result 4706 states and 7339 transitions. [2018-09-30 20:09:24,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:09:24,129 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-30 20:09:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:24,133 INFO L225 Difference]: With dead ends: 4706 [2018-09-30 20:09:24,133 INFO L226 Difference]: Without dead ends: 4704 [2018-09-30 20:09:24,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2033, Invalid=12009, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 20:09:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2018-09-30 20:09:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3514. [2018-09-30 20:09:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-09-30 20:09:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5500 transitions. [2018-09-30 20:09:25,653 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5500 transitions. Word has length 23 [2018-09-30 20:09:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:25,653 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 5500 transitions. [2018-09-30 20:09:25,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:09:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5500 transitions. [2018-09-30 20:09:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:09:25,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:25,655 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:25,655 INFO L423 AbstractCegarLoop]: === Iteration 63 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:25,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:25,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1266805704, now seen corresponding path program 1 times [2018-09-30 20:09:25,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:25,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:25,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:25,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:25,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:25,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:25,793 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 20:09:25,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:25,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:09:25,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:25,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-30 20:09:25,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:09:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:09:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:09:25,992 INFO L87 Difference]: Start difference. First operand 3514 states and 5500 transitions. Second operand 21 states. [2018-09-30 20:09:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:32,855 INFO L93 Difference]: Finished difference Result 4911 states and 7636 transitions. [2018-09-30 20:09:32,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:09:32,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2018-09-30 20:09:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:32,859 INFO L225 Difference]: With dead ends: 4911 [2018-09-30 20:09:32,860 INFO L226 Difference]: Without dead ends: 4904 [2018-09-30 20:09:32,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:09:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2018-09-30 20:09:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2925. [2018-09-30 20:09:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-09-30 20:09:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4501 transitions. [2018-09-30 20:09:34,675 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4501 transitions. Word has length 23 [2018-09-30 20:09:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:34,675 INFO L480 AbstractCegarLoop]: Abstraction has 2925 states and 4501 transitions. [2018-09-30 20:09:34,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:09:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4501 transitions. [2018-09-30 20:09:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:09:34,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:34,676 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:34,677 INFO L423 AbstractCegarLoop]: === Iteration 64 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:34,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -407447728, now seen corresponding path program 1 times [2018-09-30 20:09:34,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:34,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:34,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:34,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:34,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:09:34,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:34,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:09:35,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:35,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-30 20:09:35,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:09:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:09:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:09:35,138 INFO L87 Difference]: Start difference. First operand 2925 states and 4501 transitions. Second operand 22 states. [2018-09-30 20:09:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:40,464 INFO L93 Difference]: Finished difference Result 3641 states and 5640 transitions. [2018-09-30 20:09:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:09:40,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-30 20:09:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:40,468 INFO L225 Difference]: With dead ends: 3641 [2018-09-30 20:09:40,468 INFO L226 Difference]: Without dead ends: 3634 [2018-09-30 20:09:40,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=768, Invalid=3788, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:09:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2018-09-30 20:09:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2472. [2018-09-30 20:09:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2018-09-30 20:09:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3826 transitions. [2018-09-30 20:09:41,661 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3826 transitions. Word has length 23 [2018-09-30 20:09:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:41,662 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 3826 transitions. [2018-09-30 20:09:41,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:09:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3826 transitions. [2018-09-30 20:09:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:09:41,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:41,663 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:41,664 INFO L423 AbstractCegarLoop]: === Iteration 65 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:41,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:41,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1545525427, now seen corresponding path program 1 times [2018-09-30 20:09:41,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:41,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:41,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:41,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:41,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:41,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:41,769 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 20:09:41,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:41,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:41,895 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 20:09:41,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:41,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-30 20:09:41,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:09:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:09:41,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:09:41,917 INFO L87 Difference]: Start difference. First operand 2472 states and 3826 transitions. Second operand 15 states. [2018-09-30 20:09:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:45,894 INFO L93 Difference]: Finished difference Result 3028 states and 4680 transitions. [2018-09-30 20:09:45,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:09:45,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-30 20:09:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:45,898 INFO L225 Difference]: With dead ends: 3028 [2018-09-30 20:09:45,898 INFO L226 Difference]: Without dead ends: 3026 [2018-09-30 20:09:45,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:09:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2018-09-30 20:09:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2443. [2018-09-30 20:09:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2018-09-30 20:09:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3774 transitions. [2018-09-30 20:09:47,275 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3774 transitions. Word has length 24 [2018-09-30 20:09:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:47,276 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 3774 transitions. [2018-09-30 20:09:47,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:09:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3774 transitions. [2018-09-30 20:09:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:09:47,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:47,277 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:09:47,277 INFO L423 AbstractCegarLoop]: === Iteration 66 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:47,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:47,277 INFO L82 PathProgramCache]: Analyzing trace with hash -136248690, now seen corresponding path program 3 times [2018-09-30 20:09:47,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:47,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:47,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:47,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:47,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:09:47,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:47,468 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 20:09:47,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:09:47,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-30 20:09:47,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:47,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-30 20:09:47,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:47,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-30 20:09:47,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:09:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:09:47,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:09:47,581 INFO L87 Difference]: Start difference. First operand 2443 states and 3774 transitions. Second operand 15 states. [2018-09-30 20:09:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:50,514 INFO L93 Difference]: Finished difference Result 2592 states and 4005 transitions. [2018-09-30 20:09:50,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:09:50,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-30 20:09:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:50,517 INFO L225 Difference]: With dead ends: 2592 [2018-09-30 20:09:50,517 INFO L226 Difference]: Without dead ends: 2590 [2018-09-30 20:09:50,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:09:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2018-09-30 20:09:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2279. [2018-09-30 20:09:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2018-09-30 20:09:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3506 transitions. [2018-09-30 20:09:51,777 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3506 transitions. Word has length 24 [2018-09-30 20:09:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:51,778 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 3506 transitions. [2018-09-30 20:09:51,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:09:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3506 transitions. [2018-09-30 20:09:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:09:51,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:51,779 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:51,779 INFO L423 AbstractCegarLoop]: === Iteration 67 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:51,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:51,779 INFO L82 PathProgramCache]: Analyzing trace with hash -518454402, now seen corresponding path program 1 times [2018-09-30 20:09:51,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:51,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:51,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:51,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:51,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:51,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:51,877 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 20:09:51,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:51,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:09:51,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:51,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-30 20:09:51,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:09:51,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:09:51,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:09:51,996 INFO L87 Difference]: Start difference. First operand 2279 states and 3506 transitions. Second operand 16 states. [2018-09-30 20:09:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:55,396 INFO L93 Difference]: Finished difference Result 2414 states and 3709 transitions. [2018-09-30 20:09:55,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:09:55,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-30 20:09:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:55,399 INFO L225 Difference]: With dead ends: 2414 [2018-09-30 20:09:55,399 INFO L226 Difference]: Without dead ends: 2412 [2018-09-30 20:09:55,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:09:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2018-09-30 20:09:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2274. [2018-09-30 20:09:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2274 states. [2018-09-30 20:09:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3496 transitions. [2018-09-30 20:09:56,767 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3496 transitions. Word has length 24 [2018-09-30 20:09:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:56,767 INFO L480 AbstractCegarLoop]: Abstraction has 2274 states and 3496 transitions. [2018-09-30 20:09:56,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:09:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3496 transitions. [2018-09-30 20:09:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:09:56,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:56,769 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:56,769 INFO L423 AbstractCegarLoop]: === Iteration 68 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:56,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash -916627202, now seen corresponding path program 1 times [2018-09-30 20:09:56,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:56,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:56,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:56,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:56,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:09:56,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:56,925 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 20:09:56,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:56,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 20:09:57,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:57,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-30 20:09:57,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:09:57,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:09:57,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:09:57,048 INFO L87 Difference]: Start difference. First operand 2274 states and 3496 transitions. Second operand 16 states. [2018-09-30 20:10:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:00,780 INFO L93 Difference]: Finished difference Result 2734 states and 4210 transitions. [2018-09-30 20:10:00,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:10:00,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-09-30 20:10:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:00,783 INFO L225 Difference]: With dead ends: 2734 [2018-09-30 20:10:00,783 INFO L226 Difference]: Without dead ends: 2732 [2018-09-30 20:10:00,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:10:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-09-30 20:10:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2357. [2018-09-30 20:10:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2018-09-30 20:10:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3634 transitions. [2018-09-30 20:10:02,288 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3634 transitions. Word has length 29 [2018-09-30 20:10:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:02,289 INFO L480 AbstractCegarLoop]: Abstraction has 2357 states and 3634 transitions. [2018-09-30 20:10:02,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:10:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3634 transitions. [2018-09-30 20:10:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:10:02,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:02,290 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:02,290 INFO L423 AbstractCegarLoop]: === Iteration 69 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:02,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:02,290 INFO L82 PathProgramCache]: Analyzing trace with hash 524508242, now seen corresponding path program 1 times [2018-09-30 20:10:02,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:02,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:02,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:02,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:02,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:10:02,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:02,529 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 20:10:02,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:02,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:02,785 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 20:10:02,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:02,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 20:10:02,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:10:02,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:10:02,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:10:02,806 INFO L87 Difference]: Start difference. First operand 2357 states and 3634 transitions. Second operand 17 states. [2018-09-30 20:10:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:12,355 INFO L93 Difference]: Finished difference Result 5146 states and 8058 transitions. [2018-09-30 20:10:12,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:10:12,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-30 20:10:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:12,360 INFO L225 Difference]: With dead ends: 5146 [2018-09-30 20:10:12,360 INFO L226 Difference]: Without dead ends: 5144 [2018-09-30 20:10:12,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1591, Invalid=7915, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:10:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2018-09-30 20:10:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3465. [2018-09-30 20:10:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2018-09-30 20:10:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5438 transitions. [2018-09-30 20:10:14,408 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5438 transitions. Word has length 29 [2018-09-30 20:10:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:14,408 INFO L480 AbstractCegarLoop]: Abstraction has 3465 states and 5438 transitions. [2018-09-30 20:10:14,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:10:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5438 transitions. [2018-09-30 20:10:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:10:14,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:14,409 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:14,410 INFO L423 AbstractCegarLoop]: === Iteration 70 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:14,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1958472419, now seen corresponding path program 4 times [2018-09-30 20:10:14,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:14,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:14,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:14,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:10:14,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:14,603 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 20:10:14,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:14,625 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:14,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:14,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:10:14,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:14,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 20:10:14,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:10:14,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:10:14,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:10:14,850 INFO L87 Difference]: Start difference. First operand 3465 states and 5438 transitions. Second operand 17 states. [2018-09-30 20:10:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:23,867 INFO L93 Difference]: Finished difference Result 4974 states and 7795 transitions. [2018-09-30 20:10:23,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:10:23,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-30 20:10:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:23,872 INFO L225 Difference]: With dead ends: 4974 [2018-09-30 20:10:23,872 INFO L226 Difference]: Without dead ends: 4972 [2018-09-30 20:10:23,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1292, Invalid=5350, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:10:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2018-09-30 20:10:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 3050. [2018-09-30 20:10:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2018-09-30 20:10:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4722 transitions. [2018-09-30 20:10:25,803 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4722 transitions. Word has length 29 [2018-09-30 20:10:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:25,803 INFO L480 AbstractCegarLoop]: Abstraction has 3050 states and 4722 transitions. [2018-09-30 20:10:25,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:10:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4722 transitions. [2018-09-30 20:10:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:10:25,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:25,805 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:25,805 INFO L423 AbstractCegarLoop]: === Iteration 71 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:25,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1748672885, now seen corresponding path program 1 times [2018-09-30 20:10:25,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:25,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:25,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:10:25,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:25,995 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 20:10:26,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:26,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:10:26,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:26,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-30 20:10:26,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:10:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:10:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:10:26,240 INFO L87 Difference]: Start difference. First operand 3050 states and 4722 transitions. Second operand 24 states. [2018-09-30 20:10:37,482 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2018-09-30 20:10:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:47,367 INFO L93 Difference]: Finished difference Result 8298 states and 13026 transitions. [2018-09-30 20:10:47,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-09-30 20:10:47,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2018-09-30 20:10:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:47,374 INFO L225 Difference]: With dead ends: 8298 [2018-09-30 20:10:47,374 INFO L226 Difference]: Without dead ends: 8296 [2018-09-30 20:10:47,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18877 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5438, Invalid=41868, Unknown=0, NotChecked=0, Total=47306 [2018-09-30 20:10:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. Received shutdown request... [2018-09-30 20:10:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 5309. [2018-09-30 20:10:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5309 states. [2018-09-30 20:10:50,338 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:10:50,343 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:10:50,343 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:10:50 BoogieIcfgContainer [2018-09-30 20:10:50,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:10:50,344 INFO L168 Benchmark]: Toolchain (without parser) took 253039.34 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 196.1 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-09-30 20:10:50,345 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:50,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:50,345 INFO L168 Benchmark]: Boogie Preprocessor took 27.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:50,346 INFO L168 Benchmark]: RCFGBuilder took 611.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:10:50,346 INFO L168 Benchmark]: TraceAbstraction took 252351.32 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 174.9 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-09-30 20:10:50,348 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 611.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 252351.32 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 174.9 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 94). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 85). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 74). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 4 error locations. TIMEOUT Result, 252.2s OverallTime, 71 OverallIterations, 5 TraceHistogramMax, 193.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2683 SDtfs, 13924 SDslu, 9608 SDs, 0 SdLazy, 78848 SolverSat, 7622 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4001 GetRequests, 787 SyntacticMatches, 22 SemanticMatches, 3192 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 68003 ImplicationChecksByTransitivity, 85.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3514occurred in iteration=62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 32.5s AutomataMinimizationTime, 71 MinimizatonAttempts, 26954 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 23.2s InterpolantComputationTime, 2299 NumberOfCodeBlocks, 2293 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2164 ConstructedInterpolants, 169 QuantifiedInterpolants, 272436 SizeOfPredicates, 299 NumberOfNonLiveVariables, 3148 ConjunctsInSsa, 635 ConjunctsInUnsatCore, 135 InterpolantComputations, 14 PerfectInterpolantSequences, 245/1300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-10-50-360.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-10-50-360.csv Completed graceful shutdown