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_WithoutIf.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:06:39,561 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:06:39,563 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:06:39,579 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:06:39,579 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:06:39,582 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:06:39,583 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:06:39,586 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:06:39,590 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:06:39,596 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:06:39,597 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:06:39,597 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:06:39,601 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:06:39,602 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:06:39,606 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:06:39,607 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:06:39,609 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:06:39,610 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:06:39,615 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:06:39,618 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:06:39,619 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:06:39,620 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:06:39,622 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:06:39,639 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:06:39,665 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:06:39,665 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:06:39,667 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:06:39,667 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:06:39,668 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:06:39,668 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:06:39,668 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:06:39,669 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:06:39,670 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:06:39,670 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:06:39,670 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:06:39,670 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:06:39,671 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:06:39,671 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:06:39,671 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:06:39,671 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:06:39,671 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:06:39,672 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:06:39,672 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:06:39,672 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:06:39,672 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:06:39,672 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:06:39,673 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:06:39,673 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:06:39,673 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:06:39,673 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:06:39,675 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:06:39,675 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:06:39,675 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:06:39,675 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:06:39,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:06:39,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:06:39,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:06:39,763 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:06:39,763 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:06:39,764 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl [2018-09-30 23:06:39,764 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl' [2018-09-30 23:06:39,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:06:39,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:06:39,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:06:39,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:06:39,819 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:06:39,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,856 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:06:39,857 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:06:39,857 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:06:39,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:06:39,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:06:39,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:06:39,860 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:06:39,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... [2018-09-30 23:06:39,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:06:39,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:06:39,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:06:39,882 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:06:39,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:06:39,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-30 23:06:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-30 23:06:39,944 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-30 23:06:40,446 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:06:40,447 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:06:40 BoogieIcfgContainer [2018-09-30 23:06:40,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:06:40,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:06:40,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:06:40,452 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:06:40,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:06:39" (1/2) ... [2018-09-30 23:06:40,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baa6d0b and model type threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:06:40, skipping insertion in model container [2018-09-30 23:06:40,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:06:40" (2/2) ... [2018-09-30 23:06:40,455 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithoutIf.bpl [2018-09-30 23:06:40,471 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:06:40,484 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 23:06:40,550 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:06:40,551 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:06:40,551 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:06:40,551 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:06:40,551 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:06:40,552 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:06:40,552 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:06:40,552 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:06:40,552 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:06:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-09-30 23:06:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:06:40,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:40,576 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:06:40,578 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:40,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash 927686, now seen corresponding path program 1 times [2018-09-30 23:06:40,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:40,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:40,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:40,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:40,812 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:40,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:06:40,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:06:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:06:40,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:06:40,831 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2018-09-30 23:06:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:41,344 INFO L93 Difference]: Finished difference Result 32 states and 51 transitions. [2018-09-30 23:06:41,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:06:41,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 23:06:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:41,360 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:06:41,361 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:06:41,364 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 23:06:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:06:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2018-09-30 23:06:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:06:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2018-09-30 23:06:41,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 37 transitions. Word has length 4 [2018-09-30 23:06:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:41,407 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 37 transitions. [2018-09-30 23:06:41,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:06:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 37 transitions. [2018-09-30 23:06:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:06:41,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:41,408 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:06:41,409 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:41,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:41,409 INFO L82 PathProgramCache]: Analyzing trace with hash 930088, now seen corresponding path program 1 times [2018-09-30 23:06:41,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:41,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:41,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:41,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:41,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:41,486 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:41,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:06:41,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:06:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:06:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:06:41,489 INFO L87 Difference]: Start difference. First operand 24 states and 37 transitions. Second operand 5 states. [2018-09-30 23:06:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:41,792 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2018-09-30 23:06:41,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:06:41,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 23:06:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:41,794 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:06:41,794 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:06:41,796 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 23:06:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:06:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2018-09-30 23:06:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:06:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2018-09-30 23:06:41,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 47 transitions. Word has length 4 [2018-09-30 23:06:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:41,805 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 47 transitions. [2018-09-30 23:06:41,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:06:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 47 transitions. [2018-09-30 23:06:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:06:41,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:41,806 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:06:41,807 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:41,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:41,807 INFO L82 PathProgramCache]: Analyzing trace with hash 28768015, now seen corresponding path program 1 times [2018-09-30 23:06:41,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:41,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:41,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:41,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:41,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:41,901 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:41,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:06:41,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:06:41,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:06:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:06:41,903 INFO L87 Difference]: Start difference. First operand 30 states and 47 transitions. Second operand 6 states. [2018-09-30 23:06:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:42,505 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2018-09-30 23:06:42,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:06:42,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 23:06:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:42,507 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:06:42,507 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:06:42,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:06:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:06:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2018-09-30 23:06:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:06:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2018-09-30 23:06:42,520 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 5 [2018-09-30 23:06:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:42,520 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2018-09-30 23:06:42,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:06:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2018-09-30 23:06:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:06:42,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:42,521 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:06:42,522 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:42,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash 28831153, now seen corresponding path program 1 times [2018-09-30 23:06:42,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:42,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:42,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:42,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:42,634 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:42,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:06:42,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:06:42,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:06:42,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:06:42,637 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand 6 states. [2018-09-30 23:06:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:42,935 INFO L93 Difference]: Finished difference Result 54 states and 89 transitions. [2018-09-30 23:06:42,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:06:42,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 23:06:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:42,939 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:06:42,940 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:06:42,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:06:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:06:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2018-09-30 23:06:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:06:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 70 transitions. [2018-09-30 23:06:42,954 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 70 transitions. Word has length 5 [2018-09-30 23:06:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:42,954 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 70 transitions. [2018-09-30 23:06:42,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:06:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 70 transitions. [2018-09-30 23:06:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:42,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:42,956 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:42,956 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:42,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1974033510, now seen corresponding path program 1 times [2018-09-30 23:06:42,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:42,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:42,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:42,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:43,169 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-30 23:06:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:43,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:43,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:43,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:43,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:43,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:43,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:06:43,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:43,824 INFO L87 Difference]: Start difference. First operand 43 states and 70 transitions. Second operand 14 states. [2018-09-30 23:06:44,699 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-09-30 23:06:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:45,103 INFO L93 Difference]: Finished difference Result 107 states and 168 transitions. [2018-09-30 23:06:45,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:06:45,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2018-09-30 23:06:45,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:45,106 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:06:45,106 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:06:45,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:06:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:06:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2018-09-30 23:06:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:06:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 109 transitions. [2018-09-30 23:06:45,123 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 109 transitions. Word has length 8 [2018-09-30 23:06:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:45,123 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 109 transitions. [2018-09-30 23:06:45,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:06:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 109 transitions. [2018-09-30 23:06:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:45,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:45,125 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:45,125 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:45,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:45,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1974032228, now seen corresponding path program 1 times [2018-09-30 23:06:45,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:45,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:45,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:45,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:45,258 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:45,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-30 23:06:45,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:06:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:06:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:06:45,261 INFO L87 Difference]: Start difference. First operand 64 states and 109 transitions. Second operand 8 states. [2018-09-30 23:06:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:45,664 INFO L93 Difference]: Finished difference Result 95 states and 152 transitions. [2018-09-30 23:06:45,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:06:45,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 23:06:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:45,666 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:06:45,667 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:06:45,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:06:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:06:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-09-30 23:06:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:06:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 134 transitions. [2018-09-30 23:06:45,685 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 134 transitions. Word has length 8 [2018-09-30 23:06:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:45,686 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 134 transitions. [2018-09-30 23:06:45,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:06:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 134 transitions. [2018-09-30 23:06:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:45,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:45,687 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:45,688 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:45,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1965445341, now seen corresponding path program 1 times [2018-09-30 23:06:45,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:45,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:45,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:45,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:45,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:45,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:45,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:45,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:45,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:45,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 23:06:45,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:06:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:06:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:45,994 INFO L87 Difference]: Start difference. First operand 77 states and 134 transitions. Second operand 13 states. [2018-09-30 23:06:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:47,797 INFO L93 Difference]: Finished difference Result 150 states and 246 transitions. [2018-09-30 23:06:47,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:06:47,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-09-30 23:06:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:47,802 INFO L225 Difference]: With dead ends: 150 [2018-09-30 23:06:47,802 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 23:06:47,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:06:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 23:06:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 106. [2018-09-30 23:06:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:06:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 185 transitions. [2018-09-30 23:06:47,851 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 185 transitions. Word has length 8 [2018-09-30 23:06:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:47,852 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 185 transitions. [2018-09-30 23:06:47,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:06:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 185 transitions. [2018-09-30 23:06:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:47,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:47,855 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:47,855 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:47,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1965445053, now seen corresponding path program 1 times [2018-09-30 23:06:47,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:47,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:47,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:47,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:47,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:47,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:47,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:47,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:47,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:48,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:48,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-30 23:06:48,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:06:48,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:06:48,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:06:48,297 INFO L87 Difference]: Start difference. First operand 106 states and 185 transitions. Second operand 13 states. [2018-09-30 23:06:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:49,279 INFO L93 Difference]: Finished difference Result 137 states and 241 transitions. [2018-09-30 23:06:49,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:06:49,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-09-30 23:06:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:49,280 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:06:49,281 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:06:49,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:06:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:06:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2018-09-30 23:06:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:06:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 194 transitions. [2018-09-30 23:06:49,312 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 194 transitions. Word has length 8 [2018-09-30 23:06:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:49,317 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 194 transitions. [2018-09-30 23:06:49,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:06:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 194 transitions. [2018-09-30 23:06:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:49,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:49,320 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:49,320 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:49,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2040447037, now seen corresponding path program 1 times [2018-09-30 23:06:49,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:49,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:49,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:49,717 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-09-30 23:06:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:49,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:49,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:49,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:49,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:49,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:49,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-09-30 23:06:49,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:06:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:06:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:06:49,948 INFO L87 Difference]: Start difference. First operand 111 states and 194 transitions. Second operand 12 states. [2018-09-30 23:06:50,833 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 23:06:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:51,839 INFO L93 Difference]: Finished difference Result 211 states and 359 transitions. [2018-09-30 23:06:51,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:06:51,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-09-30 23:06:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:51,842 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:06:51,842 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:06:51,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:06:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:06:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 173. [2018-09-30 23:06:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:06:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 304 transitions. [2018-09-30 23:06:51,875 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 304 transitions. Word has length 8 [2018-09-30 23:06:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:51,876 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 304 transitions. [2018-09-30 23:06:51,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:06:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 304 transitions. [2018-09-30 23:06:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:51,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:51,877 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:51,877 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:51,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash -84509544, now seen corresponding path program 1 times [2018-09-30 23:06:51,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:51,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:51,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:51,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:51,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:51,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:51,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:51,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:51,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:52,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:52,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 23:06:52,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:06:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:06:52,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:06:52,069 INFO L87 Difference]: Start difference. First operand 173 states and 304 transitions. Second operand 10 states. [2018-09-30 23:06:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:52,928 INFO L93 Difference]: Finished difference Result 246 states and 415 transitions. [2018-09-30 23:06:52,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:06:52,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-09-30 23:06:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:52,930 INFO L225 Difference]: With dead ends: 246 [2018-09-30 23:06:52,930 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:06:52,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:06:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:06:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 201. [2018-09-30 23:06:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:06:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 358 transitions. [2018-09-30 23:06:52,967 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 358 transitions. Word has length 8 [2018-09-30 23:06:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:52,968 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 358 transitions. [2018-09-30 23:06:52,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:06:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 358 transitions. [2018-09-30 23:06:52,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:52,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:52,969 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:52,969 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:52,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:52,970 INFO L82 PathProgramCache]: Analyzing trace with hash -84508262, now seen corresponding path program 1 times [2018-09-30 23:06:52,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:52,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:52,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:52,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:52,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:53,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:53,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:53,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:06:53,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:06:53,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:06:53,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:06:53,163 INFO L87 Difference]: Start difference. First operand 201 states and 358 transitions. Second operand 7 states. [2018-09-30 23:06:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:53,746 INFO L93 Difference]: Finished difference Result 252 states and 436 transitions. [2018-09-30 23:06:53,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:06:53,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-30 23:06:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:53,748 INFO L225 Difference]: With dead ends: 252 [2018-09-30 23:06:53,748 INFO L226 Difference]: Without dead ends: 250 [2018-09-30 23:06:53,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-09-30 23:06:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2018-09-30 23:06:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 23:06:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 375 transitions. [2018-09-30 23:06:53,786 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 375 transitions. Word has length 8 [2018-09-30 23:06:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:53,786 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 375 transitions. [2018-09-30 23:06:53,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:06:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 375 transitions. [2018-09-30 23:06:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:53,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:53,787 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:53,788 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:53,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:53,788 INFO L82 PathProgramCache]: Analyzing trace with hash -75921375, now seen corresponding path program 1 times [2018-09-30 23:06:53,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:53,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:53,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:53,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:53,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:53,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:53,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:53,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:53,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:54,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:54,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 23:06:54,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:06:54,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:06:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:06:54,073 INFO L87 Difference]: Start difference. First operand 210 states and 375 transitions. Second operand 10 states. [2018-09-30 23:06:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:54,348 INFO L93 Difference]: Finished difference Result 260 states and 452 transitions. [2018-09-30 23:06:54,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:06:54,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-09-30 23:06:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:54,350 INFO L225 Difference]: With dead ends: 260 [2018-09-30 23:06:54,350 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:06:54,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:06:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:06:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 229. [2018-09-30 23:06:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:06:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 409 transitions. [2018-09-30 23:06:54,385 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 409 transitions. Word has length 8 [2018-09-30 23:06:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:54,386 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 409 transitions. [2018-09-30 23:06:54,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:06:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 409 transitions. [2018-09-30 23:06:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:54,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:54,387 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:54,387 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:54,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash -75920285, now seen corresponding path program 1 times [2018-09-30 23:06:54,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:54,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:54,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:54,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:54,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:54,473 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:06:54,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 23:06:54,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:06:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:06:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:06:54,474 INFO L87 Difference]: Start difference. First operand 229 states and 409 transitions. Second operand 7 states. [2018-09-30 23:06:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:55,130 INFO L93 Difference]: Finished difference Result 316 states and 557 transitions. [2018-09-30 23:06:55,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:06:55,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-30 23:06:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:55,133 INFO L225 Difference]: With dead ends: 316 [2018-09-30 23:06:55,133 INFO L226 Difference]: Without dead ends: 314 [2018-09-30 23:06:55,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:06:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-09-30 23:06:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2018-09-30 23:06:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:06:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 438 transitions. [2018-09-30 23:06:55,180 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 438 transitions. Word has length 8 [2018-09-30 23:06:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:55,180 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 438 transitions. [2018-09-30 23:06:55,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:06:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 438 transitions. [2018-09-30 23:06:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:06:55,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:55,182 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:55,182 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:55,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:55,182 INFO L82 PathProgramCache]: Analyzing trace with hash -35778354, now seen corresponding path program 1 times [2018-09-30 23:06:55,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:55,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:55,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:55,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:55,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:55,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:06:55,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:06:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:06:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:06:55,307 INFO L87 Difference]: Start difference. First operand 245 states and 438 transitions. Second operand 7 states. [2018-09-30 23:06:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:55,697 INFO L93 Difference]: Finished difference Result 428 states and 767 transitions. [2018-09-30 23:06:55,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:06:55,698 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-30 23:06:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:55,700 INFO L225 Difference]: With dead ends: 428 [2018-09-30 23:06:55,701 INFO L226 Difference]: Without dead ends: 426 [2018-09-30 23:06:55,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2018-09-30 23:06:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 345. [2018-09-30 23:06:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-09-30 23:06:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 622 transitions. [2018-09-30 23:06:55,762 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 622 transitions. Word has length 8 [2018-09-30 23:06:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:55,763 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 622 transitions. [2018-09-30 23:06:55,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:06:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 622 transitions. [2018-09-30 23:06:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:06:55,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:55,764 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:55,764 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:55,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:55,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1740000584, now seen corresponding path program 1 times [2018-09-30 23:06:55,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:55,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:55,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:55,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:55,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:55,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:55,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:06:56,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 23:06:56,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:06:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:06:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:06:56,000 INFO L87 Difference]: Start difference. First operand 345 states and 622 transitions. Second operand 10 states. [2018-09-30 23:06:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:06:57,067 INFO L93 Difference]: Finished difference Result 466 states and 826 transitions. [2018-09-30 23:06:57,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:06:57,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 23:06:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:06:57,071 INFO L225 Difference]: With dead ends: 466 [2018-09-30 23:06:57,071 INFO L226 Difference]: Without dead ends: 464 [2018-09-30 23:06:57,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:06:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-09-30 23:06:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 351. [2018-09-30 23:06:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-30 23:06:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 634 transitions. [2018-09-30 23:06:57,155 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 634 transitions. Word has length 11 [2018-09-30 23:06:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:06:57,155 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 634 transitions. [2018-09-30 23:06:57,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:06:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 634 transitions. [2018-09-30 23:06:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:06:57,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:06:57,156 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:06:57,157 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:06:57,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:06:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1701828094, now seen corresponding path program 1 times [2018-09-30 23:06:57,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:06:57,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:06:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:57,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:06:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:57,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:06:57,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:06:57,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:06:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:06:57,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:06:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:06:57,906 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:06:57,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2018-09-30 23:06:57,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:06:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:06:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:06:57,907 INFO L87 Difference]: Start difference. First operand 351 states and 634 transitions. Second operand 14 states. [2018-09-30 23:07:00,300 WARN L178 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-09-30 23:07:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:00,579 INFO L93 Difference]: Finished difference Result 859 states and 1521 transitions. [2018-09-30 23:07:00,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:07:00,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2018-09-30 23:07:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:00,583 INFO L225 Difference]: With dead ends: 859 [2018-09-30 23:07:00,583 INFO L226 Difference]: Without dead ends: 509 [2018-09-30 23:07:00,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:07:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2018-09-30 23:07:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 388. [2018-09-30 23:07:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-30 23:07:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 697 transitions. [2018-09-30 23:07:00,668 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 697 transitions. Word has length 11 [2018-09-30 23:07:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:00,668 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 697 transitions. [2018-09-30 23:07:00,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 697 transitions. [2018-09-30 23:07:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:00,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:00,669 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:00,670 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:00,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 707064552, now seen corresponding path program 1 times [2018-09-30 23:07:00,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:00,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:00,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:00,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:00,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:00,823 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 23:07:00,824 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:07:00,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-30 23:07:00,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:07:00,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:07:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:07:00,825 INFO L87 Difference]: Start difference. First operand 388 states and 697 transitions. Second operand 8 states. [2018-09-30 23:07:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:01,389 INFO L93 Difference]: Finished difference Result 481 states and 848 transitions. [2018-09-30 23:07:01,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:07:01,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-09-30 23:07:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:01,392 INFO L225 Difference]: With dead ends: 481 [2018-09-30 23:07:01,392 INFO L226 Difference]: Without dead ends: 479 [2018-09-30 23:07:01,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:07:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-09-30 23:07:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 394. [2018-09-30 23:07:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-09-30 23:07:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 703 transitions. [2018-09-30 23:07:01,489 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 703 transitions. Word has length 11 [2018-09-30 23:07:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:01,490 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 703 transitions. [2018-09-30 23:07:01,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:07:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 703 transitions. [2018-09-30 23:07:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:01,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:01,491 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:01,491 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:01,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:01,492 INFO L82 PathProgramCache]: Analyzing trace with hash 739509354, now seen corresponding path program 1 times [2018-09-30 23:07:01,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:01,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:01,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:01,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:01,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:01,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:01,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:01,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:01,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:01,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:01,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 23:07:01,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:01,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:01,739 INFO L87 Difference]: Start difference. First operand 394 states and 703 transitions. Second operand 13 states. [2018-09-30 23:07:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:02,892 INFO L93 Difference]: Finished difference Result 952 states and 1676 transitions. [2018-09-30 23:07:02,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:02,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-09-30 23:07:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:02,895 INFO L225 Difference]: With dead ends: 952 [2018-09-30 23:07:02,895 INFO L226 Difference]: Without dead ends: 559 [2018-09-30 23:07:02,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:07:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-09-30 23:07:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 473. [2018-09-30 23:07:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-09-30 23:07:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 835 transitions. [2018-09-30 23:07:02,979 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 835 transitions. Word has length 11 [2018-09-30 23:07:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:02,980 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 835 transitions. [2018-09-30 23:07:02,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 835 transitions. [2018-09-30 23:07:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:02,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:02,981 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:02,981 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:02,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1106731073, now seen corresponding path program 1 times [2018-09-30 23:07:02,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:02,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:02,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:02,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:02,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:03,078 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 23:07:03,079 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:07:03,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 23:07:03,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:07:03,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:07:03,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:07:03,080 INFO L87 Difference]: Start difference. First operand 473 states and 835 transitions. Second operand 8 states. [2018-09-30 23:07:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:03,523 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2018-09-30 23:07:03,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:07:03,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-09-30 23:07:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:03,528 INFO L225 Difference]: With dead ends: 524 [2018-09-30 23:07:03,528 INFO L226 Difference]: Without dead ends: 522 [2018-09-30 23:07:03,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2018-09-30 23:07:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 485. [2018-09-30 23:07:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2018-09-30 23:07:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 855 transitions. [2018-09-30 23:07:03,643 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 855 transitions. Word has length 11 [2018-09-30 23:07:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:03,643 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 855 transitions. [2018-09-30 23:07:03,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:07:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 855 transitions. [2018-09-30 23:07:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:03,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:03,644 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:03,645 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:03,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1098144186, now seen corresponding path program 1 times [2018-09-30 23:07:03,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:03,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:03,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:04,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:04,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:04,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:04,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:04,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:04,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-09-30 23:07:04,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:07:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:07:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:07:04,497 INFO L87 Difference]: Start difference. First operand 485 states and 855 transitions. Second operand 9 states. [2018-09-30 23:07:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:05,579 INFO L93 Difference]: Finished difference Result 556 states and 964 transitions. [2018-09-30 23:07:05,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:07:05,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2018-09-30 23:07:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:05,581 INFO L225 Difference]: With dead ends: 556 [2018-09-30 23:07:05,581 INFO L226 Difference]: Without dead ends: 554 [2018-09-30 23:07:05,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:07:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2018-09-30 23:07:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 489. [2018-09-30 23:07:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2018-09-30 23:07:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 861 transitions. [2018-09-30 23:07:05,670 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 861 transitions. Word has length 11 [2018-09-30 23:07:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:05,670 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 861 transitions. [2018-09-30 23:07:05,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:07:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 861 transitions. [2018-09-30 23:07:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:05,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:05,671 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:05,671 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:05,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash -772910566, now seen corresponding path program 1 times [2018-09-30 23:07:05,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:05,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:05,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:05,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:05,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:05,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:05,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:05,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:05,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:05,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:05,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2018-09-30 23:07:05,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:05,888 INFO L87 Difference]: Start difference. First operand 489 states and 861 transitions. Second operand 13 states. [2018-09-30 23:07:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:06,894 INFO L93 Difference]: Finished difference Result 631 states and 1077 transitions. [2018-09-30 23:07:06,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:07:06,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-09-30 23:07:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:06,897 INFO L225 Difference]: With dead ends: 631 [2018-09-30 23:07:06,897 INFO L226 Difference]: Without dead ends: 629 [2018-09-30 23:07:06,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:07:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-30 23:07:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 513. [2018-09-30 23:07:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-09-30 23:07:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 904 transitions. [2018-09-30 23:07:07,007 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 904 transitions. Word has length 11 [2018-09-30 23:07:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:07,007 INFO L480 AbstractCegarLoop]: Abstraction has 513 states and 904 transitions. [2018-09-30 23:07:07,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 904 transitions. [2018-09-30 23:07:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:07,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:07,008 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:07,008 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:07,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1674153000, now seen corresponding path program 2 times [2018-09-30 23:07:07,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:07,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:07,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:07,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:07,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:07,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:07,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:07,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:07:07,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:07:07,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:07:07,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:07,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:07,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:07:07,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:07,197 INFO L87 Difference]: Start difference. First operand 513 states and 904 transitions. Second operand 7 states. [2018-09-30 23:07:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:07,717 INFO L93 Difference]: Finished difference Result 601 states and 1040 transitions. [2018-09-30 23:07:07,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:07:07,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:07:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:07,722 INFO L225 Difference]: With dead ends: 601 [2018-09-30 23:07:07,722 INFO L226 Difference]: Without dead ends: 599 [2018-09-30 23:07:07,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2018-09-30 23:07:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 509. [2018-09-30 23:07:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2018-09-30 23:07:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 898 transitions. [2018-09-30 23:07:07,822 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 898 transitions. Word has length 11 [2018-09-30 23:07:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:07,822 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 898 transitions. [2018-09-30 23:07:07,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:07:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 898 transitions. [2018-09-30 23:07:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:07,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:07,823 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:07,823 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:07,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1682742259, now seen corresponding path program 1 times [2018-09-30 23:07:07,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:07,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:07,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:07:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:07,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:07,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:07,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:07,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:07,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:07,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:07:07,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:07,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:07,937 INFO L87 Difference]: Start difference. First operand 509 states and 898 transitions. Second operand 7 states. [2018-09-30 23:07:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:08,436 INFO L93 Difference]: Finished difference Result 624 states and 1088 transitions. [2018-09-30 23:07:08,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:07:08,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:07:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:08,438 INFO L225 Difference]: With dead ends: 624 [2018-09-30 23:07:08,438 INFO L226 Difference]: Without dead ends: 622 [2018-09-30 23:07:08,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2018-09-30 23:07:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 538. [2018-09-30 23:07:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2018-09-30 23:07:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 949 transitions. [2018-09-30 23:07:08,535 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 949 transitions. Word has length 11 [2018-09-30 23:07:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:08,536 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 949 transitions. [2018-09-30 23:07:08,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:07:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 949 transitions. [2018-09-30 23:07:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:08,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:08,536 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:08,537 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:08,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1927251354, now seen corresponding path program 1 times [2018-09-30 23:07:08,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:08,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:08,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:08,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:08,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:08,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:08,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:08,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:08,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:08,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:08,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:07:08,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:08,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:08,661 INFO L87 Difference]: Start difference. First operand 538 states and 949 transitions. Second operand 7 states. [2018-09-30 23:07:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:09,101 INFO L93 Difference]: Finished difference Result 584 states and 1012 transitions. [2018-09-30 23:07:09,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:07:09,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:07:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:09,103 INFO L225 Difference]: With dead ends: 584 [2018-09-30 23:07:09,103 INFO L226 Difference]: Without dead ends: 582 [2018-09-30 23:07:09,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-09-30 23:07:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 543. [2018-09-30 23:07:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-09-30 23:07:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 956 transitions. [2018-09-30 23:07:09,199 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 956 transitions. Word has length 11 [2018-09-30 23:07:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:09,199 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 956 transitions. [2018-09-30 23:07:09,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:07:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 956 transitions. [2018-09-30 23:07:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:09,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:09,200 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:09,200 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:09,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:09,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1918662095, now seen corresponding path program 1 times [2018-09-30 23:07:09,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:09,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:09,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:09,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:09,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:09,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:09,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:09,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:09,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:09,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:07:09,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:09,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:09,339 INFO L87 Difference]: Start difference. First operand 543 states and 956 transitions. Second operand 7 states. [2018-09-30 23:07:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:09,757 INFO L93 Difference]: Finished difference Result 618 states and 1074 transitions. [2018-09-30 23:07:09,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:07:09,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:07:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:09,760 INFO L225 Difference]: With dead ends: 618 [2018-09-30 23:07:09,760 INFO L226 Difference]: Without dead ends: 616 [2018-09-30 23:07:09,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2018-09-30 23:07:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 529. [2018-09-30 23:07:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2018-09-30 23:07:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 929 transitions. [2018-09-30 23:07:09,856 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 929 transitions. Word has length 11 [2018-09-30 23:07:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:09,856 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 929 transitions. [2018-09-30 23:07:09,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:07:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 929 transitions. [2018-09-30 23:07:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:07:09,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:09,857 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:09,857 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:09,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1878520164, now seen corresponding path program 1 times [2018-09-30 23:07:09,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:09,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:09,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:09,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:09,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:09,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:09,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:09,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:09,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:09,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:07:09,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:07:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:07:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:07:09,955 INFO L87 Difference]: Start difference. First operand 529 states and 929 transitions. Second operand 7 states. [2018-09-30 23:07:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:10,407 INFO L93 Difference]: Finished difference Result 613 states and 1066 transitions. [2018-09-30 23:07:10,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:07:10,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:07:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:10,410 INFO L225 Difference]: With dead ends: 613 [2018-09-30 23:07:10,410 INFO L226 Difference]: Without dead ends: 611 [2018-09-30 23:07:10,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2018-09-30 23:07:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 523. [2018-09-30 23:07:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2018-09-30 23:07:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 914 transitions. [2018-09-30 23:07:10,510 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 914 transitions. Word has length 11 [2018-09-30 23:07:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:10,510 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 914 transitions. [2018-09-30 23:07:10,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:07:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 914 transitions. [2018-09-30 23:07:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:07:10,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:10,511 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:10,511 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:10,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:10,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1730497723, now seen corresponding path program 1 times [2018-09-30 23:07:10,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:10,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:10,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:10,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:10,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:11,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:11,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:11,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:11,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:11,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:11,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 23:07:11,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:11,691 INFO L87 Difference]: Start difference. First operand 523 states and 914 transitions. Second operand 12 states. [2018-09-30 23:07:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:12,674 INFO L93 Difference]: Finished difference Result 875 states and 1523 transitions. [2018-09-30 23:07:12,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:07:12,674 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 23:07:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:12,678 INFO L225 Difference]: With dead ends: 875 [2018-09-30 23:07:12,678 INFO L226 Difference]: Without dead ends: 873 [2018-09-30 23:07:12,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:07:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2018-09-30 23:07:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 651. [2018-09-30 23:07:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-09-30 23:07:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1146 transitions. [2018-09-30 23:07:12,798 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1146 transitions. Word has length 12 [2018-09-30 23:07:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:12,799 INFO L480 AbstractCegarLoop]: Abstraction has 651 states and 1146 transitions. [2018-09-30 23:07:12,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1146 transitions. [2018-09-30 23:07:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:07:12,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:12,799 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:12,800 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:12,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:12,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1895489947, now seen corresponding path program 1 times [2018-09-30 23:07:12,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:12,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:12,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:12,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:12,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:12,901 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 23:07:12,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:12,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:12,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:12,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:12,995 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 23:07:13,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:13,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-09-30 23:07:13,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:07:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:07:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:07:13,021 INFO L87 Difference]: Start difference. First operand 651 states and 1146 transitions. Second operand 13 states. [2018-09-30 23:07:14,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:14,494 INFO L93 Difference]: Finished difference Result 1281 states and 2254 transitions. [2018-09-30 23:07:14,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:07:14,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 23:07:14,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:14,499 INFO L225 Difference]: With dead ends: 1281 [2018-09-30 23:07:14,499 INFO L226 Difference]: Without dead ends: 1279 [2018-09-30 23:07:14,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:07:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-09-30 23:07:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 923. [2018-09-30 23:07:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-09-30 23:07:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1627 transitions. [2018-09-30 23:07:14,678 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1627 transitions. Word has length 12 [2018-09-30 23:07:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:14,678 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1627 transitions. [2018-09-30 23:07:14,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:07:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1627 transitions. [2018-09-30 23:07:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:14,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:14,679 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:14,679 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:14,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -397030605, now seen corresponding path program 1 times [2018-09-30 23:07:14,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:14,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:14,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:14,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:14,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:14,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:14,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:14,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:14,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:14,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:14,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 23:07:14,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:14,893 INFO L87 Difference]: Start difference. First operand 923 states and 1627 transitions. Second operand 11 states. [2018-09-30 23:07:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:15,583 INFO L93 Difference]: Finished difference Result 1054 states and 1838 transitions. [2018-09-30 23:07:15,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:07:15,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-30 23:07:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:15,587 INFO L225 Difference]: With dead ends: 1054 [2018-09-30 23:07:15,587 INFO L226 Difference]: Without dead ends: 1052 [2018-09-30 23:07:15,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 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 23:07:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2018-09-30 23:07:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 933. [2018-09-30 23:07:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2018-09-30 23:07:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1644 transitions. [2018-09-30 23:07:15,784 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1644 transitions. Word has length 14 [2018-09-30 23:07:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:15,784 INFO L480 AbstractCegarLoop]: Abstraction has 933 states and 1644 transitions. [2018-09-30 23:07:15,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1644 transitions. [2018-09-30 23:07:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:15,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:15,785 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:15,786 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:15,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1593749093, now seen corresponding path program 2 times [2018-09-30 23:07:15,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:15,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:15,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:15,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:15,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:15,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:15,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:15,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:07:15,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:07:15,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:07:15,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:16,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:16,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 23:07:16,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:16,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:16,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:16,008 INFO L87 Difference]: Start difference. First operand 933 states and 1644 transitions. Second operand 12 states. [2018-09-30 23:07:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:17,088 INFO L93 Difference]: Finished difference Result 1125 states and 1938 transitions. [2018-09-30 23:07:17,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:07:17,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-30 23:07:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:17,093 INFO L225 Difference]: With dead ends: 1125 [2018-09-30 23:07:17,093 INFO L226 Difference]: Without dead ends: 1123 [2018-09-30 23:07:17,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:07:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2018-09-30 23:07:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 923. [2018-09-30 23:07:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-09-30 23:07:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1627 transitions. [2018-09-30 23:07:17,269 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1627 transitions. Word has length 14 [2018-09-30 23:07:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:17,269 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1627 transitions. [2018-09-30 23:07:17,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1627 transitions. [2018-09-30 23:07:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:17,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:17,270 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:17,270 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:17,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:17,270 INFO L82 PathProgramCache]: Analyzing trace with hash -213121378, now seen corresponding path program 1 times [2018-09-30 23:07:17,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:17,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:17,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:17,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:07:17,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:17,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:17,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:17,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:17,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:17,483 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 23:07:17,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:17,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-30 23:07:17,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:07:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:07:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:07:17,505 INFO L87 Difference]: Start difference. First operand 923 states and 1627 transitions. Second operand 14 states. [2018-09-30 23:07:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:18,967 INFO L93 Difference]: Finished difference Result 1125 states and 1949 transitions. [2018-09-30 23:07:18,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:07:18,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:07:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:18,972 INFO L225 Difference]: With dead ends: 1125 [2018-09-30 23:07:18,972 INFO L226 Difference]: Without dead ends: 1123 [2018-09-30 23:07:18,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:07:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2018-09-30 23:07:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 919. [2018-09-30 23:07:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2018-09-30 23:07:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1620 transitions. [2018-09-30 23:07:19,141 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1620 transitions. Word has length 14 [2018-09-30 23:07:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:19,142 INFO L480 AbstractCegarLoop]: Abstraction has 919 states and 1620 transitions. [2018-09-30 23:07:19,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:07:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1620 transitions. [2018-09-30 23:07:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:19,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:19,142 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:19,143 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:19,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1838595071, now seen corresponding path program 1 times [2018-09-30 23:07:19,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:19,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:19,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:19,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:19,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:19,249 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 23:07:19,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:19,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:19,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:19,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:19,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:19,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2018-09-30 23:07:19,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:07:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:07:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:07:19,322 INFO L87 Difference]: Start difference. First operand 919 states and 1620 transitions. Second operand 12 states. [2018-09-30 23:07:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:20,181 INFO L93 Difference]: Finished difference Result 1117 states and 1948 transitions. [2018-09-30 23:07:20,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:07:20,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-30 23:07:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:20,186 INFO L225 Difference]: With dead ends: 1117 [2018-09-30 23:07:20,186 INFO L226 Difference]: Without dead ends: 1115 [2018-09-30 23:07:20,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:07:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2018-09-30 23:07:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 883. [2018-09-30 23:07:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-09-30 23:07:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1560 transitions. [2018-09-30 23:07:20,386 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1560 transitions. Word has length 14 [2018-09-30 23:07:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:20,387 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 1560 transitions. [2018-09-30 23:07:20,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:07:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1560 transitions. [2018-09-30 23:07:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:07:20,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:20,388 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:20,388 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:20,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:20,389 INFO L82 PathProgramCache]: Analyzing trace with hash -47479579, now seen corresponding path program 1 times [2018-09-30 23:07:20,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:20,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:20,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:20,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:20,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:20,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:20,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:20,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:20,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:20,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:20,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 23:07:20,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:07:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:07:20,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:07:20,592 INFO L87 Difference]: Start difference. First operand 883 states and 1560 transitions. Second operand 11 states. [2018-09-30 23:07:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:21,359 INFO L93 Difference]: Finished difference Result 995 states and 1722 transitions. [2018-09-30 23:07:21,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:07:21,359 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-30 23:07:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:21,362 INFO L225 Difference]: With dead ends: 995 [2018-09-30 23:07:21,362 INFO L226 Difference]: Without dead ends: 993 [2018-09-30 23:07:21,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:07:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2018-09-30 23:07:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 877. [2018-09-30 23:07:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2018-09-30 23:07:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1548 transitions. [2018-09-30 23:07:21,533 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1548 transitions. Word has length 14 [2018-09-30 23:07:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:21,533 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 1548 transitions. [2018-09-30 23:07:21,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:07:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1548 transitions. [2018-09-30 23:07:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:21,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:21,535 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:07:21,535 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:21,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2027388784, now seen corresponding path program 1 times [2018-09-30 23:07:21,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:21,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:21,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:21,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:21,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:21,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:21,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:21,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:21,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:21,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:21,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2018-09-30 23:07:21,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:07:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:07:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:07:21,922 INFO L87 Difference]: Start difference. First operand 877 states and 1548 transitions. Second operand 17 states. [2018-09-30 23:07:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:24,442 INFO L93 Difference]: Finished difference Result 2105 states and 3670 transitions. [2018-09-30 23:07:24,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:07:24,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2018-09-30 23:07:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:24,447 INFO L225 Difference]: With dead ends: 2105 [2018-09-30 23:07:24,447 INFO L226 Difference]: Without dead ends: 1229 [2018-09-30 23:07:24,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=635, Invalid=2557, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:07:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-09-30 23:07:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1014. [2018-09-30 23:07:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2018-09-30 23:07:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1752 transitions. [2018-09-30 23:07:24,667 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1752 transitions. Word has length 15 [2018-09-30 23:07:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:24,667 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 1752 transitions. [2018-09-30 23:07:24,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:07:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1752 transitions. [2018-09-30 23:07:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:24,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:24,668 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:24,668 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:24,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1084233543, now seen corresponding path program 1 times [2018-09-30 23:07:24,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:24,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:24,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:24,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:24,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:24,787 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 23:07:24,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:24,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:24,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:24,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:24,910 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 23:07:24,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:24,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 23:07:24,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:24,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:24,931 INFO L87 Difference]: Start difference. First operand 1014 states and 1752 transitions. Second operand 15 states. [2018-09-30 23:07:25,677 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-09-30 23:07:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:26,889 INFO L93 Difference]: Finished difference Result 2110 states and 3623 transitions. [2018-09-30 23:07:26,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:07:26,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:07:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:26,894 INFO L225 Difference]: With dead ends: 2110 [2018-09-30 23:07:26,894 INFO L226 Difference]: Without dead ends: 1097 [2018-09-30 23:07:26,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:07:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-09-30 23:07:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 951. [2018-09-30 23:07:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-09-30 23:07:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1643 transitions. [2018-09-30 23:07:27,105 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1643 transitions. Word has length 15 [2018-09-30 23:07:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:27,105 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 1643 transitions. [2018-09-30 23:07:27,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1643 transitions. [2018-09-30 23:07:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:27,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:27,107 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:27,107 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:27,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash -185533858, now seen corresponding path program 1 times [2018-09-30 23:07:27,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:27,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:27,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:27,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:27,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:27,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:27,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:27,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:27,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:27,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:27,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 23:07:27,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:27,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:27,328 INFO L87 Difference]: Start difference. First operand 951 states and 1643 transitions. Second operand 15 states. [2018-09-30 23:07:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:29,744 INFO L93 Difference]: Finished difference Result 2832 states and 4780 transitions. [2018-09-30 23:07:29,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:07:29,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:07:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:29,751 INFO L225 Difference]: With dead ends: 2832 [2018-09-30 23:07:29,751 INFO L226 Difference]: Without dead ends: 1867 [2018-09-30 23:07:29,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=702, Invalid=3330, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:07:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2018-09-30 23:07:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1571. [2018-09-30 23:07:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2018-09-30 23:07:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2660 transitions. [2018-09-30 23:07:30,141 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2660 transitions. Word has length 15 [2018-09-30 23:07:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:30,142 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 2660 transitions. [2018-09-30 23:07:30,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2660 transitions. [2018-09-30 23:07:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:30,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:30,143 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:30,143 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:30,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:30,144 INFO L82 PathProgramCache]: Analyzing trace with hash -497943192, now seen corresponding path program 1 times [2018-09-30 23:07:30,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:30,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:30,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:30,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:30,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:30,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:30,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:30,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:30,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:07:30,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:30,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 23:07:30,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:30,342 INFO L87 Difference]: Start difference. First operand 1571 states and 2660 transitions. Second operand 15 states. [2018-09-30 23:07:33,663 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-09-30 23:07:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:34,563 INFO L93 Difference]: Finished difference Result 4461 states and 7467 transitions. [2018-09-30 23:07:34,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:07:34,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:07:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:34,591 INFO L225 Difference]: With dead ends: 4461 [2018-09-30 23:07:34,592 INFO L226 Difference]: Without dead ends: 2887 [2018-09-30 23:07:34,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1321, Invalid=5159, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:07:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2018-09-30 23:07:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2284. [2018-09-30 23:07:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2018-09-30 23:07:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3759 transitions. [2018-09-30 23:07:35,608 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3759 transitions. Word has length 15 [2018-09-30 23:07:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:35,609 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 3759 transitions. [2018-09-30 23:07:35,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3759 transitions. [2018-09-30 23:07:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:35,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:35,613 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:07:35,613 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:35,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1957708543, now seen corresponding path program 1 times [2018-09-30 23:07:35,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:35,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:35,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:35,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:35,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:36,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:36,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:36,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:36,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:36,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:36,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 23:07:36,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:36,985 INFO L87 Difference]: Start difference. First operand 2284 states and 3759 transitions. Second operand 16 states. [2018-09-30 23:07:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:40,954 INFO L93 Difference]: Finished difference Result 3903 states and 6372 transitions. [2018-09-30 23:07:40,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:07:40,954 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 23:07:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:40,961 INFO L225 Difference]: With dead ends: 3903 [2018-09-30 23:07:40,961 INFO L226 Difference]: Without dead ends: 3227 [2018-09-30 23:07:40,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1137, Invalid=6873, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:07:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2018-09-30 23:07:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2428. [2018-09-30 23:07:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2018-09-30 23:07:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 4065 transitions. [2018-09-30 23:07:41,560 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 4065 transitions. Word has length 15 [2018-09-30 23:07:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:41,560 INFO L480 AbstractCegarLoop]: Abstraction has 2428 states and 4065 transitions. [2018-09-30 23:07:41,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:07:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 4065 transitions. [2018-09-30 23:07:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:41,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:41,562 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:41,562 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:41,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1386290021, now seen corresponding path program 1 times [2018-09-30 23:07:41,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:41,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:41,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:41,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:41,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:42,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:42,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:42,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:42,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:42,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:42,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 23:07:42,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:42,245 INFO L87 Difference]: Start difference. First operand 2428 states and 4065 transitions. Second operand 15 states. [2018-09-30 23:07:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:44,943 INFO L93 Difference]: Finished difference Result 5427 states and 9046 transitions. [2018-09-30 23:07:44,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:07:44,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:07:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:44,951 INFO L225 Difference]: With dead ends: 5427 [2018-09-30 23:07:44,952 INFO L226 Difference]: Without dead ends: 2851 [2018-09-30 23:07:44,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=632, Invalid=2790, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:07:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2018-09-30 23:07:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2500. [2018-09-30 23:07:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2500 states. [2018-09-30 23:07:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 4177 transitions. [2018-09-30 23:07:45,645 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 4177 transitions. Word has length 15 [2018-09-30 23:07:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:45,645 INFO L480 AbstractCegarLoop]: Abstraction has 2500 states and 4177 transitions. [2018-09-30 23:07:45,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 4177 transitions. [2018-09-30 23:07:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:07:45,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:45,646 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:07:45,647 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:45,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -38293542, now seen corresponding path program 1 times [2018-09-30 23:07:45,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:45,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:45,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:45,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:45,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:45,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:45,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:45,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:45,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:45,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:45,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 23:07:45,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:07:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:07:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:07:45,850 INFO L87 Difference]: Start difference. First operand 2500 states and 4177 transitions. Second operand 15 states. [2018-09-30 23:07:48,271 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2018-09-30 23:07:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:48,851 INFO L93 Difference]: Finished difference Result 5837 states and 9708 transitions. [2018-09-30 23:07:48,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:07:48,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:07:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:48,859 INFO L225 Difference]: With dead ends: 5837 [2018-09-30 23:07:48,859 INFO L226 Difference]: Without dead ends: 3072 [2018-09-30 23:07:48,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=3247, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:07:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2018-09-30 23:07:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2605. [2018-09-30 23:07:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2605 states. [2018-09-30 23:07:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 4349 transitions. [2018-09-30 23:07:49,596 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 4349 transitions. Word has length 15 [2018-09-30 23:07:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:49,596 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 4349 transitions. [2018-09-30 23:07:49,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:07:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 4349 transitions. [2018-09-30 23:07:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:49,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:49,598 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:07:49,598 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:49,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1793898800, now seen corresponding path program 1 times [2018-09-30 23:07:49,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:49,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:49,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:49,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:49,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:07:49,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:49,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:49,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:49,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:49,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:49,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:07:49,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:07:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:07:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:07:49,958 INFO L87 Difference]: Start difference. First operand 2605 states and 4349 transitions. Second operand 20 states. [2018-09-30 23:07:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:55,884 INFO L93 Difference]: Finished difference Result 5120 states and 8519 transitions. [2018-09-30 23:07:55,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:07:55,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2018-09-30 23:07:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:55,890 INFO L225 Difference]: With dead ends: 5120 [2018-09-30 23:07:55,891 INFO L226 Difference]: Without dead ends: 3342 [2018-09-30 23:07:55,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1800, Invalid=9972, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:07:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2018-09-30 23:07:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2886. [2018-09-30 23:07:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2886 states. [2018-09-30 23:07:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4822 transitions. [2018-09-30 23:07:56,632 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4822 transitions. Word has length 18 [2018-09-30 23:07:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:07:56,632 INFO L480 AbstractCegarLoop]: Abstraction has 2886 states and 4822 transitions. [2018-09-30 23:07:56,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:07:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4822 transitions. [2018-09-30 23:07:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:07:56,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:07:56,633 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:07:56,633 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:07:56,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:07:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1793897518, now seen corresponding path program 1 times [2018-09-30 23:07:56,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:07:56,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:07:56,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:56,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:56,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:07:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:07:56,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:07:56,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:07:56,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:07:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:07:56,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:07:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:07:56,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:07:56,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2018-09-30 23:07:56,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:07:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:07:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:07:56,912 INFO L87 Difference]: Start difference. First operand 2886 states and 4822 transitions. Second operand 16 states. [2018-09-30 23:07:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:07:59,854 INFO L93 Difference]: Finished difference Result 3487 states and 5852 transitions. [2018-09-30 23:07:59,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:07:59,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 23:07:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:07:59,860 INFO L225 Difference]: With dead ends: 3487 [2018-09-30 23:07:59,861 INFO L226 Difference]: Without dead ends: 3485 [2018-09-30 23:07:59,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=616, Invalid=3544, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:07:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2018-09-30 23:08:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2999. [2018-09-30 23:08:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2999 states. [2018-09-30 23:08:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 5026 transitions. [2018-09-30 23:08:00,724 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 5026 transitions. Word has length 18 [2018-09-30 23:08:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:00,724 INFO L480 AbstractCegarLoop]: Abstraction has 2999 states and 5026 transitions. [2018-09-30 23:08:00,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:08:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 5026 transitions. [2018-09-30 23:08:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:00,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:00,726 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:00,726 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:00,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1785310631, now seen corresponding path program 1 times [2018-09-30 23:08:00,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:00,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:00,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:00,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:00,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:00,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:00,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:00,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:00,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:00,962 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 23:08:00,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:00,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-30 23:08:00,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:08:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:08:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:08:00,984 INFO L87 Difference]: Start difference. First operand 2999 states and 5026 transitions. Second operand 15 states. [2018-09-30 23:08:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:04,096 INFO L93 Difference]: Finished difference Result 3557 states and 5973 transitions. [2018-09-30 23:08:04,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:08:04,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-30 23:08:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:04,102 INFO L225 Difference]: With dead ends: 3557 [2018-09-30 23:08:04,102 INFO L226 Difference]: Without dead ends: 3555 [2018-09-30 23:08:04,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=674, Invalid=3486, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:08:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2018-09-30 23:08:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3102. [2018-09-30 23:08:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3102 states. [2018-09-30 23:08:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 5194 transitions. [2018-09-30 23:08:04,907 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 5194 transitions. Word has length 18 [2018-09-30 23:08:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:04,907 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 5194 transitions. [2018-09-30 23:08:04,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:08:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 5194 transitions. [2018-09-30 23:08:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:04,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:04,909 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:04,909 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:04,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1256757274, now seen corresponding path program 2 times [2018-09-30 23:08:04,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:04,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:04,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:04,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:04,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:05,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:05,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:05,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:05,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:05,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:05,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:05,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:05,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 23:08:05,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:05,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:05,211 INFO L87 Difference]: Start difference. First operand 3102 states and 5194 transitions. Second operand 18 states. [2018-09-30 23:08:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:13,351 INFO L93 Difference]: Finished difference Result 5252 states and 8823 transitions. [2018-09-30 23:08:13,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:08:13,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:08:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:13,357 INFO L225 Difference]: With dead ends: 5252 [2018-09-30 23:08:13,357 INFO L226 Difference]: Without dead ends: 5250 [2018-09-30 23:08:13,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2825, Invalid=16915, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:08:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2018-09-30 23:08:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 3515. [2018-09-30 23:08:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3515 states. [2018-09-30 23:08:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 5926 transitions. [2018-09-30 23:08:14,138 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 5926 transitions. Word has length 18 [2018-09-30 23:08:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:14,138 INFO L480 AbstractCegarLoop]: Abstraction has 3515 states and 5926 transitions. [2018-09-30 23:08:14,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 5926 transitions. [2018-09-30 23:08:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:14,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:14,139 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:14,139 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:14,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:14,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1248170387, now seen corresponding path program 2 times [2018-09-30 23:08:14,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:14,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:14,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:14,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:14,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:14,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:14,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:14,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:14,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:14,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:14,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:14,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:14,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-30 23:08:14,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:14,501 INFO L87 Difference]: Start difference. First operand 3515 states and 5926 transitions. Second operand 18 states. [2018-09-30 23:08:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:22,500 INFO L93 Difference]: Finished difference Result 4843 states and 8107 transitions. [2018-09-30 23:08:22,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:08:22,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:08:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:22,505 INFO L225 Difference]: With dead ends: 4843 [2018-09-30 23:08:22,505 INFO L226 Difference]: Without dead ends: 4841 [2018-09-30 23:08:22,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6131 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2645, Invalid=12855, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:08:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2018-09-30 23:08:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 3405. [2018-09-30 23:08:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3405 states. [2018-09-30 23:08:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5721 transitions. [2018-09-30 23:08:23,270 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5721 transitions. Word has length 18 [2018-09-30 23:08:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:23,271 INFO L480 AbstractCegarLoop]: Abstraction has 3405 states and 5721 transitions. [2018-09-30 23:08:23,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5721 transitions. [2018-09-30 23:08:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:23,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:23,272 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:23,272 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:23,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1231339551, now seen corresponding path program 2 times [2018-09-30 23:08:23,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:23,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:23,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:23,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:23,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:23,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:23,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:23,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:23,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:23,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:23,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:08:23,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:23,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 23:08:23,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:08:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:08:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:08:23,489 INFO L87 Difference]: Start difference. First operand 3405 states and 5721 transitions. Second operand 16 states. [2018-09-30 23:08:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:26,205 INFO L93 Difference]: Finished difference Result 5774 states and 9598 transitions. [2018-09-30 23:08:26,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:08:26,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 23:08:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:26,210 INFO L225 Difference]: With dead ends: 5774 [2018-09-30 23:08:26,210 INFO L226 Difference]: Without dead ends: 3100 [2018-09-30 23:08:26,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=695, Invalid=2385, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:08:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2018-09-30 23:08:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2583. [2018-09-30 23:08:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2018-09-30 23:08:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4270 transitions. [2018-09-30 23:08:26,827 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4270 transitions. Word has length 18 [2018-09-30 23:08:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:26,827 INFO L480 AbstractCegarLoop]: Abstraction has 2583 states and 4270 transitions. [2018-09-30 23:08:26,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:08:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4270 transitions. [2018-09-30 23:08:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:26,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:26,828 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:26,828 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:26,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1890837259, now seen corresponding path program 1 times [2018-09-30 23:08:26,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:26,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:26,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:26,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:26,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:26,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:26,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:26,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:26,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:08:27,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:27,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-30 23:08:27,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:08:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:08:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:08:27,031 INFO L87 Difference]: Start difference. First operand 2583 states and 4270 transitions. Second operand 15 states. [2018-09-30 23:08:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:29,601 INFO L93 Difference]: Finished difference Result 3114 states and 5123 transitions. [2018-09-30 23:08:29,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:08:29,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-30 23:08:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:29,604 INFO L225 Difference]: With dead ends: 3114 [2018-09-30 23:08:29,604 INFO L226 Difference]: Without dead ends: 3112 [2018-09-30 23:08:29,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=1847, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:08:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2018-09-30 23:08:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2773. [2018-09-30 23:08:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2018-09-30 23:08:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 4589 transitions. [2018-09-30 23:08:30,284 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 4589 transitions. Word has length 18 [2018-09-30 23:08:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:30,284 INFO L480 AbstractCegarLoop]: Abstraction has 2773 states and 4589 transitions. [2018-09-30 23:08:30,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:08:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 4589 transitions. [2018-09-30 23:08:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:30,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:30,286 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:30,286 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:30,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 740718717, now seen corresponding path program 2 times [2018-09-30 23:08:30,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:30,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:30,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:30,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:30,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:30,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:30,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:30,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:08:30,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:08:30,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:30,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:30,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:30,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-30 23:08:30,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:08:30,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:08:30,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:08:30,751 INFO L87 Difference]: Start difference. First operand 2773 states and 4589 transitions. Second operand 17 states. [2018-09-30 23:08:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:36,082 INFO L93 Difference]: Finished difference Result 4415 states and 7404 transitions. [2018-09-30 23:08:36,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:08:36,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-30 23:08:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:36,086 INFO L225 Difference]: With dead ends: 4415 [2018-09-30 23:08:36,087 INFO L226 Difference]: Without dead ends: 4413 [2018-09-30 23:08:36,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1803, Invalid=6939, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:08:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-09-30 23:08:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 3073. [2018-09-30 23:08:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3073 states. [2018-09-30 23:08:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 5108 transitions. [2018-09-30 23:08:36,909 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 5108 transitions. Word has length 18 [2018-09-30 23:08:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:36,909 INFO L480 AbstractCegarLoop]: Abstraction has 3073 states and 5108 transitions. [2018-09-30 23:08:36,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:08:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 5108 transitions. [2018-09-30 23:08:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:36,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:36,910 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:36,910 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:36,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1434281659, now seen corresponding path program 1 times [2018-09-30 23:08:36,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:36,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:36,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:36,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:08:36,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:37,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:37,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:37,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:37,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:37,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:37,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-30 23:08:37,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:08:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:08:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:08:37,151 INFO L87 Difference]: Start difference. First operand 3073 states and 5108 transitions. Second operand 16 states. [2018-09-30 23:08:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:41,251 INFO L93 Difference]: Finished difference Result 4429 states and 7411 transitions. [2018-09-30 23:08:41,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:08:41,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 23:08:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:41,255 INFO L225 Difference]: With dead ends: 4429 [2018-09-30 23:08:41,255 INFO L226 Difference]: Without dead ends: 4427 [2018-09-30 23:08:41,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:08:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2018-09-30 23:08:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 2723. [2018-09-30 23:08:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2723 states. [2018-09-30 23:08:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4478 transitions. [2018-09-30 23:08:42,014 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 4478 transitions. Word has length 18 [2018-09-30 23:08:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:42,014 INFO L480 AbstractCegarLoop]: Abstraction has 2723 states and 4478 transitions. [2018-09-30 23:08:42,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:08:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 4478 transitions. [2018-09-30 23:08:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:42,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:42,015 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:42,016 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:42,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1483012849, now seen corresponding path program 1 times [2018-09-30 23:08:42,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:42,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:42,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:42,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:42,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:42,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:42,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:42,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:42,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:42,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:42,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 23:08:42,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:42,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:42,309 INFO L87 Difference]: Start difference. First operand 2723 states and 4478 transitions. Second operand 18 states. [2018-09-30 23:08:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:08:46,963 INFO L93 Difference]: Finished difference Result 4290 states and 7151 transitions. [2018-09-30 23:08:46,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:08:46,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:08:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:08:46,966 INFO L225 Difference]: With dead ends: 4290 [2018-09-30 23:08:46,966 INFO L226 Difference]: Without dead ends: 4288 [2018-09-30 23:08:46,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=986, Invalid=4416, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:08:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2018-09-30 23:08:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3364. [2018-09-30 23:08:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3364 states. [2018-09-30 23:08:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 5610 transitions. [2018-09-30 23:08:47,927 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 5610 transitions. Word has length 18 [2018-09-30 23:08:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:08:47,927 INFO L480 AbstractCegarLoop]: Abstraction has 3364 states and 5610 transitions. [2018-09-30 23:08:47,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:08:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 5610 transitions. [2018-09-30 23:08:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:08:47,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:08:47,928 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:08:47,929 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:08:47,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:08:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1851213523, now seen corresponding path program 3 times [2018-09-30 23:08:47,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:08:47,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:08:47,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:47,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:08:47,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:08:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:08:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:08:48,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:08:48,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:08:48,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:08:48,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:08:48,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:08:48,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:08:48,242 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 23:08:48,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:08:48,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 23:08:48,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:08:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:08:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:08:48,265 INFO L87 Difference]: Start difference. First operand 3364 states and 5610 transitions. Second operand 18 states. [2018-09-30 23:08:53,817 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-09-30 23:08:56,753 WARN L178 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-09-30 23:08:59,649 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2018-09-30 23:09:00,421 WARN L178 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-09-30 23:09:00,853 WARN L178 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-09-30 23:09:02,785 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-30 23:09:03,980 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-30 23:09:04,596 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-09-30 23:09:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:10,552 INFO L93 Difference]: Finished difference Result 9624 states and 16323 transitions. [2018-09-30 23:09:10,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-09-30 23:09:10,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:09:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:10,562 INFO L225 Difference]: With dead ends: 9624 [2018-09-30 23:09:10,562 INFO L226 Difference]: Without dead ends: 9622 [2018-09-30 23:09:10,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16036 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=6166, Invalid=32839, Unknown=1, NotChecked=0, Total=39006 [2018-09-30 23:09:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2018-09-30 23:09:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 3326. [2018-09-30 23:09:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3326 states. [2018-09-30 23:09:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 5536 transitions. [2018-09-30 23:09:11,636 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 5536 transitions. Word has length 18 [2018-09-30 23:09:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:11,637 INFO L480 AbstractCegarLoop]: Abstraction has 3326 states and 5536 transitions. [2018-09-30 23:09:11,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:09:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 5536 transitions. [2018-09-30 23:09:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:09:11,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:11,639 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:11,639 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:11,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:11,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1899944713, now seen corresponding path program 1 times [2018-09-30 23:09:11,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:11,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:11,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:11,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:11,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:11,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:11,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:11,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:11,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:11,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:11,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-09-30 23:09:11,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:09:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:09:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:09:11,889 INFO L87 Difference]: Start difference. First operand 3326 states and 5536 transitions. Second operand 17 states. [2018-09-30 23:09:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:17,517 INFO L93 Difference]: Finished difference Result 5572 states and 9460 transitions. [2018-09-30 23:09:17,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:09:17,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-30 23:09:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:17,523 INFO L225 Difference]: With dead ends: 5572 [2018-09-30 23:09:17,523 INFO L226 Difference]: Without dead ends: 5570 [2018-09-30 23:09:17,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1511, Invalid=7045, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:09:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2018-09-30 23:09:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3526. [2018-09-30 23:09:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3526 states. [2018-09-30 23:09:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5899 transitions. [2018-09-30 23:09:18,769 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5899 transitions. Word has length 18 [2018-09-30 23:09:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:18,769 INFO L480 AbstractCegarLoop]: Abstraction has 3526 states and 5899 transitions. [2018-09-30 23:09:18,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:09:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5899 transitions. [2018-09-30 23:09:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:09:18,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:18,770 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:18,771 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:18,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1150743797, now seen corresponding path program 2 times [2018-09-30 23:09:18,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:18,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:18,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:18,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:18,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:18,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:18,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:18,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:18,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:18,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:18,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:19,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:19,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-09-30 23:09:19,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:09:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:09:19,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:09:19,016 INFO L87 Difference]: Start difference. First operand 3526 states and 5899 transitions. Second operand 17 states. [2018-09-30 23:09:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:23,423 INFO L93 Difference]: Finished difference Result 4458 states and 7480 transitions. [2018-09-30 23:09:23,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:09:23,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-30 23:09:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:23,426 INFO L225 Difference]: With dead ends: 4458 [2018-09-30 23:09:23,427 INFO L226 Difference]: Without dead ends: 4456 [2018-09-30 23:09:23,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=904, Invalid=5258, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:09:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2018-09-30 23:09:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3633. [2018-09-30 23:09:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2018-09-30 23:09:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 6081 transitions. [2018-09-30 23:09:24,728 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 6081 transitions. Word has length 18 [2018-09-30 23:09:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:24,728 INFO L480 AbstractCegarLoop]: Abstraction has 3633 states and 6081 transitions. [2018-09-30 23:09:24,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:09:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 6081 transitions. [2018-09-30 23:09:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:09:24,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:24,729 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:24,730 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:24,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1665373557, now seen corresponding path program 1 times [2018-09-30 23:09:24,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:24,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:24,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:24,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:09:24,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:24,902 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 23:09:24,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:24,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:24,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:24,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:25,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:25,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-30 23:09:25,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:09:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:09:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:09:25,764 INFO L87 Difference]: Start difference. First operand 3633 states and 6081 transitions. Second operand 21 states. [2018-09-30 23:09:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:29,941 INFO L93 Difference]: Finished difference Result 4389 states and 7355 transitions. [2018-09-30 23:09:29,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:09:29,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2018-09-30 23:09:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:29,946 INFO L225 Difference]: With dead ends: 4389 [2018-09-30 23:09:29,946 INFO L226 Difference]: Without dead ends: 4376 [2018-09-30 23:09:29,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3181, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:09:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2018-09-30 23:09:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 4152. [2018-09-30 23:09:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4152 states. [2018-09-30 23:09:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 6931 transitions. [2018-09-30 23:09:31,428 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 6931 transitions. Word has length 19 [2018-09-30 23:09:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:31,429 INFO L480 AbstractCegarLoop]: Abstraction has 4152 states and 6931 transitions. [2018-09-30 23:09:31,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:09:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 6931 transitions. [2018-09-30 23:09:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:09:31,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:31,430 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:31,430 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:31,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1271169050, now seen corresponding path program 1 times [2018-09-30 23:09:31,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:31,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:31,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:31,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:31,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:31,548 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 23:09:31,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:31,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:31,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:31,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:31,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:31,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2018-09-30 23:09:31,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:09:31,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:09:31,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:09:31,703 INFO L87 Difference]: Start difference. First operand 4152 states and 6931 transitions. Second operand 19 states. [2018-09-30 23:09:39,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:39,512 INFO L93 Difference]: Finished difference Result 7602 states and 12857 transitions. [2018-09-30 23:09:39,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:09:39,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 23:09:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:39,518 INFO L225 Difference]: With dead ends: 7602 [2018-09-30 23:09:39,518 INFO L226 Difference]: Without dead ends: 7553 [2018-09-30 23:09:39,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1106, Invalid=4006, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:09:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7553 states. [2018-09-30 23:09:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7553 to 5765. [2018-09-30 23:09:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5765 states. [2018-09-30 23:09:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 9725 transitions. [2018-09-30 23:09:41,801 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 9725 transitions. Word has length 19 [2018-09-30 23:09:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:41,801 INFO L480 AbstractCegarLoop]: Abstraction has 5765 states and 9725 transitions. [2018-09-30 23:09:41,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:09:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 9725 transitions. [2018-09-30 23:09:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:09:41,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:41,802 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:09:41,803 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:41,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1231183154, now seen corresponding path program 1 times [2018-09-30 23:09:41,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:41,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:41,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:41,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:41,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:09:41,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:41,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:41,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:41,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:09:42,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:42,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2018-09-30 23:09:42,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:09:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:09:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:09:42,192 INFO L87 Difference]: Start difference. First operand 5765 states and 9725 transitions. Second operand 18 states. [2018-09-30 23:09:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:09:53,628 INFO L93 Difference]: Finished difference Result 10730 states and 18220 transitions. [2018-09-30 23:09:53,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:09:53,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2018-09-30 23:09:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:09:53,639 INFO L225 Difference]: With dead ends: 10730 [2018-09-30 23:09:53,639 INFO L226 Difference]: Without dead ends: 10673 [2018-09-30 23:09:53,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1268, Invalid=5872, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:09:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2018-09-30 23:09:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 5867. [2018-09-30 23:09:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5867 states. [2018-09-30 23:09:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 9873 transitions. [2018-09-30 23:09:56,393 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 9873 transitions. Word has length 19 [2018-09-30 23:09:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:09:56,393 INFO L480 AbstractCegarLoop]: Abstraction has 5867 states and 9873 transitions. [2018-09-30 23:09:56,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:09:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 9873 transitions. [2018-09-30 23:09:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:09:56,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:09:56,395 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:09:56,395 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:09:56,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:09:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash -298147634, now seen corresponding path program 2 times [2018-09-30 23:09:56,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:09:56,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:09:56,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:56,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:09:56,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:09:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:09:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:09:56,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:09:56,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:09:56,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:09:56,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:09:56,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:09:56,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:09:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:09:56,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:09:56,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-30 23:09:56,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:09:56,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:09:56,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:09:56,661 INFO L87 Difference]: Start difference. First operand 5867 states and 9873 transitions. Second operand 20 states. [2018-09-30 23:10:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:02,037 INFO L93 Difference]: Finished difference Result 12951 states and 21640 transitions. [2018-09-30 23:10:02,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:10:02,037 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 23:10:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:02,044 INFO L225 Difference]: With dead ends: 12951 [2018-09-30 23:10:02,044 INFO L226 Difference]: Without dead ends: 7453 [2018-09-30 23:10:02,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1983, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:10:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2018-09-30 23:10:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 6977. [2018-09-30 23:10:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6977 states. [2018-09-30 23:10:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 11514 transitions. [2018-09-30 23:10:05,287 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 11514 transitions. Word has length 21 [2018-09-30 23:10:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:05,287 INFO L480 AbstractCegarLoop]: Abstraction has 6977 states and 11514 transitions. [2018-09-30 23:10:05,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:10:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 11514 transitions. [2018-09-30 23:10:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:10:05,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:05,289 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:05,289 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:05,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1920603351, now seen corresponding path program 1 times [2018-09-30 23:10:05,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:05,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:05,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:05,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:10:05,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:05,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:05,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:05,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:05,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:05,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:05,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2018-09-30 23:10:05,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:10:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:10:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:10:05,518 INFO L87 Difference]: Start difference. First operand 6977 states and 11514 transitions. Second operand 17 states. [2018-09-30 23:10:10,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:10,951 INFO L93 Difference]: Finished difference Result 7309 states and 12055 transitions. [2018-09-30 23:10:10,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:10:10,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-30 23:10:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:10,957 INFO L225 Difference]: With dead ends: 7309 [2018-09-30 23:10:10,957 INFO L226 Difference]: Without dead ends: 7307 [2018-09-30 23:10:10,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:10:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2018-09-30 23:10:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 6935. [2018-09-30 23:10:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6935 states. [2018-09-30 23:10:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 11445 transitions. [2018-09-30 23:10:13,917 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 11445 transitions. Word has length 21 [2018-09-30 23:10:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:13,917 INFO L480 AbstractCegarLoop]: Abstraction has 6935 states and 11445 transitions. [2018-09-30 23:10:13,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:10:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 11445 transitions. [2018-09-30 23:10:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:10:13,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:13,919 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:13,919 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:13,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1010297104, now seen corresponding path program 1 times [2018-09-30 23:10:13,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:13,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:13,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:13,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:13,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:10:14,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:14,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:14,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:14,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 23:10:15,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:15,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 23:10:15,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:10:15,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:10:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:10:15,370 INFO L87 Difference]: Start difference. First operand 6935 states and 11445 transitions. Second operand 21 states. [2018-09-30 23:10:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:21,815 INFO L93 Difference]: Finished difference Result 11330 states and 18599 transitions. [2018-09-30 23:10:21,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:10:21,816 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 23:10:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:21,824 INFO L225 Difference]: With dead ends: 11330 [2018-09-30 23:10:21,824 INFO L226 Difference]: Without dead ends: 7599 [2018-09-30 23:10:21,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=590, Invalid=3442, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:10:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2018-09-30 23:10:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 6837. [2018-09-30 23:10:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6837 states. [2018-09-30 23:10:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 11276 transitions. [2018-09-30 23:10:24,977 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 11276 transitions. Word has length 21 [2018-09-30 23:10:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:24,978 INFO L480 AbstractCegarLoop]: Abstraction has 6837 states and 11276 transitions. [2018-09-30 23:10:24,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:10:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 11276 transitions. [2018-09-30 23:10:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:10:24,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:24,980 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 23:10:24,980 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:24,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash -972124902, now seen corresponding path program 1 times [2018-09-30 23:10:24,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:24,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:24,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:24,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:24,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:25,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:25,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:25,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:25,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:10:25,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:25,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-30 23:10:25,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:10:25,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:10:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:10:25,401 INFO L87 Difference]: Start difference. First operand 6837 states and 11276 transitions. Second operand 15 states. [2018-09-30 23:10:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:29,996 INFO L93 Difference]: Finished difference Result 7136 states and 11762 transitions. [2018-09-30 23:10:29,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:10:29,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 23:10:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:30,002 INFO L225 Difference]: With dead ends: 7136 [2018-09-30 23:10:30,002 INFO L226 Difference]: Without dead ends: 7134 [2018-09-30 23:10:30,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:10:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2018-09-30 23:10:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 6814. [2018-09-30 23:10:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6814 states. [2018-09-30 23:10:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 11236 transitions. [2018-09-30 23:10:32,970 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 11236 transitions. Word has length 21 [2018-09-30 23:10:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:32,970 INFO L480 AbstractCegarLoop]: Abstraction has 6814 states and 11236 transitions. [2018-09-30 23:10:32,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:10:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 11236 transitions. [2018-09-30 23:10:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:10:32,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:32,972 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:10:32,972 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:32,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1513598179, now seen corresponding path program 4 times [2018-09-30 23:10:32,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:32,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:32,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:32,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:32,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:33,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:33,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:33,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:10:33,120 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:10:33,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:10:33,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:10:33,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:33,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:10:33,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:10:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:10:33,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:10:33,352 INFO L87 Difference]: Start difference. First operand 6814 states and 11236 transitions. Second operand 20 states. [2018-09-30 23:10:34,129 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-30 23:10:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:10:46,222 INFO L93 Difference]: Finished difference Result 19394 states and 31307 transitions. [2018-09-30 23:10:46,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:10:46,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 23:10:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:10:46,234 INFO L225 Difference]: With dead ends: 19394 [2018-09-30 23:10:46,235 INFO L226 Difference]: Without dead ends: 12053 [2018-09-30 23:10:46,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6952 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2115, Invalid=16245, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:10:46,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12053 states. [2018-09-30 23:10:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12053 to 9291. [2018-09-30 23:10:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9291 states. [2018-09-30 23:10:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9291 states to 9291 states and 15178 transitions. [2018-09-30 23:10:50,719 INFO L78 Accepts]: Start accepts. Automaton has 9291 states and 15178 transitions. Word has length 21 [2018-09-30 23:10:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:10:50,720 INFO L480 AbstractCegarLoop]: Abstraction has 9291 states and 15178 transitions. [2018-09-30 23:10:50,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:10:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9291 states and 15178 transitions. [2018-09-30 23:10:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:10:50,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:10:50,722 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:10:50,722 INFO L423 AbstractCegarLoop]: === Iteration 62 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:10:50,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:10:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1688920231, now seen corresponding path program 1 times [2018-09-30 23:10:50,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:10:50,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:10:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:50,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:10:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:10:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:50,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:10:50,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:10:50,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:10:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:10:50,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:10:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:10:50,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:10:50,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 23:10:50,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:10:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:10:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:10:50,952 INFO L87 Difference]: Start difference. First operand 9291 states and 15178 transitions. Second operand 17 states. [2018-09-30 23:11:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:02,942 INFO L93 Difference]: Finished difference Result 13375 states and 21772 transitions. [2018-09-30 23:11:02,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:11:02,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-30 23:11:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:02,954 INFO L225 Difference]: With dead ends: 13375 [2018-09-30 23:11:02,955 INFO L226 Difference]: Without dead ends: 13373 [2018-09-30 23:11:02,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1587, Invalid=6069, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:11:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13373 states. [2018-09-30 23:11:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13373 to 9079. [2018-09-30 23:11:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9079 states. [2018-09-30 23:11:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9079 states to 9079 states and 14709 transitions. [2018-09-30 23:11:07,517 INFO L78 Accepts]: Start accepts. Automaton has 9079 states and 14709 transitions. Word has length 21 [2018-09-30 23:11:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:07,517 INFO L480 AbstractCegarLoop]: Abstraction has 9079 states and 14709 transitions. [2018-09-30 23:11:07,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:11:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9079 states and 14709 transitions. [2018-09-30 23:11:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:11:07,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:07,519 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 23:11:07,519 INFO L423 AbstractCegarLoop]: === Iteration 63 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:07,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:07,520 INFO L82 PathProgramCache]: Analyzing trace with hash 534864297, now seen corresponding path program 1 times [2018-09-30 23:11:07,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:07,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:07,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:07,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:07,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:08,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:08,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:08,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:08,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:08,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:08,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2018-09-30 23:11:08,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:11:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:11:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:11:08,840 INFO L87 Difference]: Start difference. First operand 9079 states and 14709 transitions. Second operand 16 states. [2018-09-30 23:11:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:20,647 INFO L93 Difference]: Finished difference Result 13742 states and 22372 transitions. [2018-09-30 23:11:20,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:11:20,648 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 23:11:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:20,663 INFO L225 Difference]: With dead ends: 13742 [2018-09-30 23:11:20,663 INFO L226 Difference]: Without dead ends: 13740 [2018-09-30 23:11:20,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=665, Invalid=2641, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:11:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13740 states. [2018-09-30 23:11:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13740 to 8516. [2018-09-30 23:11:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8516 states. [2018-09-30 23:11:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8516 states to 8516 states and 13792 transitions. [2018-09-30 23:11:25,051 INFO L78 Accepts]: Start accepts. Automaton has 8516 states and 13792 transitions. Word has length 21 [2018-09-30 23:11:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:25,052 INFO L480 AbstractCegarLoop]: Abstraction has 8516 states and 13792 transitions. [2018-09-30 23:11:25,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:11:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 8516 states and 13792 transitions. [2018-09-30 23:11:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:11:25,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:25,054 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:11:25,054 INFO L423 AbstractCegarLoop]: === Iteration 64 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:25,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1298110833, now seen corresponding path program 5 times [2018-09-30 23:11:25,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:25,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:25,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:25,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:11:25,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:25,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:25,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:25,187 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:11:25,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-30 23:11:25,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:25,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:11:25,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:25,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 23:11:25,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:11:25,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:11:25,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:11:25,392 INFO L87 Difference]: Start difference. First operand 8516 states and 13792 transitions. Second operand 19 states. [2018-09-30 23:11:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:36,950 INFO L93 Difference]: Finished difference Result 17223 states and 27528 transitions. [2018-09-30 23:11:36,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:11:36,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 23:11:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:36,960 INFO L225 Difference]: With dead ends: 17223 [2018-09-30 23:11:36,960 INFO L226 Difference]: Without dead ends: 10865 [2018-09-30 23:11:36,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4997 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1492, Invalid=12080, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:11:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2018-09-30 23:11:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 8834. [2018-09-30 23:11:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8834 states. [2018-09-30 23:11:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8834 states to 8834 states and 14310 transitions. [2018-09-30 23:11:41,636 INFO L78 Accepts]: Start accepts. Automaton has 8834 states and 14310 transitions. Word has length 21 [2018-09-30 23:11:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:11:41,636 INFO L480 AbstractCegarLoop]: Abstraction has 8834 states and 14310 transitions. [2018-09-30 23:11:41,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:11:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8834 states and 14310 transitions. [2018-09-30 23:11:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:11:41,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:11:41,639 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:11:41,639 INFO L423 AbstractCegarLoop]: === Iteration 65 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:11:41,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:11:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2122062335, now seen corresponding path program 6 times [2018-09-30 23:11:41,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:11:41,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:11:41,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:41,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:11:41,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:11:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:11:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:11:41,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:11:41,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:11:41,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:11:41,761 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-30 23:11:41,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:11:41,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:11:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:11:41,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:11:41,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:11:41,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:11:41,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:11:41,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:11:41,955 INFO L87 Difference]: Start difference. First operand 8834 states and 14310 transitions. Second operand 20 states. [2018-09-30 23:11:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:11:57,076 INFO L93 Difference]: Finished difference Result 20093 states and 32247 transitions. [2018-09-30 23:11:57,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:11:57,076 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 23:11:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:11:57,088 INFO L225 Difference]: With dead ends: 20093 [2018-09-30 23:11:57,089 INFO L226 Difference]: Without dead ends: 13529 [2018-09-30 23:11:57,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7019 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2036, Invalid=16054, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:11:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13529 states. [2018-09-30 23:12:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13529 to 10071. [2018-09-30 23:12:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10071 states. [2018-09-30 23:12:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10071 states to 10071 states and 16389 transitions. [2018-09-30 23:12:02,795 INFO L78 Accepts]: Start accepts. Automaton has 10071 states and 16389 transitions. Word has length 21 [2018-09-30 23:12:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:02,795 INFO L480 AbstractCegarLoop]: Abstraction has 10071 states and 16389 transitions. [2018-09-30 23:12:02,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:12:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10071 states and 16389 transitions. [2018-09-30 23:12:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:12:02,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:02,798 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:12:02,798 INFO L423 AbstractCegarLoop]: === Iteration 66 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:02,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:02,798 INFO L82 PathProgramCache]: Analyzing trace with hash 306604689, now seen corresponding path program 2 times [2018-09-30 23:12:02,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:02,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:02,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:02,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:12:02,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:12:02,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:02,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:02,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:12:02,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:12:02,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:12:02,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:12:03,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:03,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-30 23:12:03,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:12:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:12:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:12:03,011 INFO L87 Difference]: Start difference. First operand 10071 states and 16389 transitions. Second operand 15 states. [2018-09-30 23:12:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:15,341 INFO L93 Difference]: Finished difference Result 13234 states and 21552 transitions. [2018-09-30 23:12:15,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:12:15,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 23:12:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:15,352 INFO L225 Difference]: With dead ends: 13234 [2018-09-30 23:12:15,352 INFO L226 Difference]: Without dead ends: 13232 [2018-09-30 23:12:15,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=871, Invalid=2911, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:12:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13232 states. [2018-09-30 23:12:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13232 to 9754. [2018-09-30 23:12:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9754 states. [2018-09-30 23:12:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9754 states to 9754 states and 15875 transitions. [2018-09-30 23:12:20,950 INFO L78 Accepts]: Start accepts. Automaton has 9754 states and 15875 transitions. Word has length 21 [2018-09-30 23:12:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:20,951 INFO L480 AbstractCegarLoop]: Abstraction has 9754 states and 15875 transitions. [2018-09-30 23:12:20,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:12:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9754 states and 15875 transitions. [2018-09-30 23:12:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:12:20,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:20,953 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:12:20,953 INFO L423 AbstractCegarLoop]: === Iteration 67 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:20,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash 568644285, now seen corresponding path program 1 times [2018-09-30 23:12:20,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:20,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:20,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:20,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:12:20,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:12:21,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:21,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:21,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:12:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:21,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:12:21,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:21,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 23:12:21,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:12:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:12:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:12:21,335 INFO L87 Difference]: Start difference. First operand 9754 states and 15875 transitions. Second operand 20 states. [2018-09-30 23:12:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:37,041 INFO L93 Difference]: Finished difference Result 20700 states and 33340 transitions. [2018-09-30 23:12:37,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:12:37,042 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 23:12:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:37,058 INFO L225 Difference]: With dead ends: 20700 [2018-09-30 23:12:37,059 INFO L226 Difference]: Without dead ends: 15449 [2018-09-30 23:12:37,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1736, Invalid=14266, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:12:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15449 states. [2018-09-30 23:12:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15449 to 11980. [2018-09-30 23:12:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11980 states. [2018-09-30 23:12:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19629 transitions. [2018-09-30 23:12:44,451 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19629 transitions. Word has length 21 [2018-09-30 23:12:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:12:44,452 INFO L480 AbstractCegarLoop]: Abstraction has 11980 states and 19629 transitions. [2018-09-30 23:12:44,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:12:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19629 transitions. [2018-09-30 23:12:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:12:44,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:12:44,454 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 23:12:44,454 INFO L423 AbstractCegarLoop]: === Iteration 68 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:12:44,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:12:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1246813361, now seen corresponding path program 2 times [2018-09-30 23:12:44,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:12:44,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:12:44,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:44,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:12:44,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:12:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:12:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:12:44,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:12:44,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:12:44,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:12:44,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:12:44,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:12:44,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:12:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:12:44,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:12:44,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-30 23:12:44,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:12:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:12:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:12:44,773 INFO L87 Difference]: Start difference. First operand 11980 states and 19629 transitions. Second operand 15 states. [2018-09-30 23:12:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:12:56,016 INFO L93 Difference]: Finished difference Result 13143 states and 21525 transitions. [2018-09-30 23:12:56,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:12:56,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 23:12:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:12:56,028 INFO L225 Difference]: With dead ends: 13143 [2018-09-30 23:12:56,028 INFO L226 Difference]: Without dead ends: 13141 [2018-09-30 23:12:56,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=506, Invalid=1944, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:12:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2018-09-30 23:13:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 11837. [2018-09-30 23:13:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11837 states. [2018-09-30 23:13:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11837 states to 11837 states and 19389 transitions. [2018-09-30 23:13:03,281 INFO L78 Accepts]: Start accepts. Automaton has 11837 states and 19389 transitions. Word has length 21 [2018-09-30 23:13:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:13:03,282 INFO L480 AbstractCegarLoop]: Abstraction has 11837 states and 19389 transitions. [2018-09-30 23:13:03,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:13:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11837 states and 19389 transitions. [2018-09-30 23:13:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:13:03,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:13:03,284 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:13:03,284 INFO L423 AbstractCegarLoop]: === Iteration 69 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:13:03,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:13:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash -585075777, now seen corresponding path program 3 times [2018-09-30 23:13:03,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:13:03,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:13:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:03,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:13:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:13:03,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:13:03,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:13:03,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:13:03,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:13:03,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:13:03,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:13:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:13:03,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:13:03,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2018-09-30 23:13:03,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:13:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:13:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:13:03,595 INFO L87 Difference]: Start difference. First operand 11837 states and 19389 transitions. Second operand 22 states. [2018-09-30 23:13:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:13:27,779 INFO L93 Difference]: Finished difference Result 20079 states and 33025 transitions. [2018-09-30 23:13:27,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:13:27,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 23:13:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:13:27,800 INFO L225 Difference]: With dead ends: 20079 [2018-09-30 23:13:27,800 INFO L226 Difference]: Without dead ends: 19893 [2018-09-30 23:13:27,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5167 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3940, Invalid=12316, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:13:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2018-09-30 23:13:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 6903. [2018-09-30 23:13:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6903 states. [2018-09-30 23:13:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6903 states to 6903 states and 11162 transitions. [2018-09-30 23:13:32,860 INFO L78 Accepts]: Start accepts. Automaton has 6903 states and 11162 transitions. Word has length 22 [2018-09-30 23:13:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:13:32,860 INFO L480 AbstractCegarLoop]: Abstraction has 6903 states and 11162 transitions. [2018-09-30 23:13:32,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:13:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 6903 states and 11162 transitions. [2018-09-30 23:13:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:13:32,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:13:32,863 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:13:32,863 INFO L423 AbstractCegarLoop]: === Iteration 70 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:13:32,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:13:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash -781144100, now seen corresponding path program 7 times [2018-09-30 23:13:32,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:13:32,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:13:32,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:32,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:13:32,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:13:32,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:13:32,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:13:33,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:13:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:33,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:13:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:13:33,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:13:33,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2018-09-30 23:13:33,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:13:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:13:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:13:33,122 INFO L87 Difference]: Start difference. First operand 6903 states and 11162 transitions. Second operand 17 states. [2018-09-30 23:13:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:13:42,094 INFO L93 Difference]: Finished difference Result 8874 states and 14289 transitions. [2018-09-30 23:13:42,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:13:42,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-30 23:13:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:13:42,101 INFO L225 Difference]: With dead ends: 8874 [2018-09-30 23:13:42,102 INFO L226 Difference]: Without dead ends: 8872 [2018-09-30 23:13:42,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:13:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8872 states. [2018-09-30 23:13:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8872 to 7798. [2018-09-30 23:13:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7798 states. [2018-09-30 23:13:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 12609 transitions. [2018-09-30 23:13:48,036 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 12609 transitions. Word has length 24 [2018-09-30 23:13:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:13:48,036 INFO L480 AbstractCegarLoop]: Abstraction has 7798 states and 12609 transitions. [2018-09-30 23:13:48,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:13:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 12609 transitions. [2018-09-30 23:13:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:13:48,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:13:48,039 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1] [2018-09-30 23:13:48,039 INFO L423 AbstractCegarLoop]: === Iteration 71 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:13:48,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:13:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1997760783, now seen corresponding path program 3 times [2018-09-30 23:13:48,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:13:48,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:13:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:48,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:13:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:13:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:13:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:13:48,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:13:48,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:13:48,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:13:48,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:13:48,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:13:48,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:13:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 23:13:48,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:13:48,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2018-09-30 23:13:48,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:13:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:13:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:13:48,539 INFO L87 Difference]: Start difference. First operand 7798 states and 12609 transitions. Second operand 24 states. [2018-09-30 23:13:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:13:59,500 INFO L93 Difference]: Finished difference Result 14302 states and 23068 transitions. [2018-09-30 23:13:59,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:13:59,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2018-09-30 23:13:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:13:59,508 INFO L225 Difference]: With dead ends: 14302 [2018-09-30 23:13:59,509 INFO L226 Difference]: Without dead ends: 8969 [2018-09-30 23:13:59,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4310 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1747, Invalid=10685, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:13:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8969 states. [2018-09-30 23:14:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8969 to 8315. [2018-09-30 23:14:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8315 states. [2018-09-30 23:14:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8315 states to 8315 states and 13423 transitions. [2018-09-30 23:14:05,551 INFO L78 Accepts]: Start accepts. Automaton has 8315 states and 13423 transitions. Word has length 25 [2018-09-30 23:14:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:14:05,551 INFO L480 AbstractCegarLoop]: Abstraction has 8315 states and 13423 transitions. [2018-09-30 23:14:05,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:14:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8315 states and 13423 transitions. [2018-09-30 23:14:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:14:05,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:14:05,554 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:14:05,555 INFO L423 AbstractCegarLoop]: === Iteration 72 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:14:05,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:14:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1735749504, now seen corresponding path program 1 times [2018-09-30 23:14:05,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:14:05,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:14:05,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:05,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:14:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:14:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:14:05,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:14:05,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:14:05,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:14:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:14:05,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:14:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:14:06,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:14:06,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2018-09-30 23:14:06,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:14:06,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:14:06,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:14:06,052 INFO L87 Difference]: Start difference. First operand 8315 states and 13423 transitions. Second operand 24 states. [2018-09-30 23:14:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:14:24,492 INFO L93 Difference]: Finished difference Result 12302 states and 20068 transitions. [2018-09-30 23:14:24,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:14:24,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2018-09-30 23:14:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:14:24,503 INFO L225 Difference]: With dead ends: 12302 [2018-09-30 23:14:24,503 INFO L226 Difference]: Without dead ends: 12300 [2018-09-30 23:14:24,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7787 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4285, Invalid=18065, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:14:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2018-09-30 23:14:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 9724. [2018-09-30 23:14:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9724 states. [2018-09-30 23:14:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9724 states to 9724 states and 15777 transitions. [2018-09-30 23:14:31,195 INFO L78 Accepts]: Start accepts. Automaton has 9724 states and 15777 transitions. Word has length 25 [2018-09-30 23:14:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:14:31,196 INFO L480 AbstractCegarLoop]: Abstraction has 9724 states and 15777 transitions. [2018-09-30 23:14:31,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:14:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 9724 states and 15777 transitions. [2018-09-30 23:14:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:14:31,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:14:31,199 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:14:31,200 INFO L423 AbstractCegarLoop]: === Iteration 73 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:14:31,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:14:31,200 INFO L82 PathProgramCache]: Analyzing trace with hash 813820726, now seen corresponding path program 3 times [2018-09-30 23:14:31,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:14:31,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:14:31,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:31,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:14:31,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:14:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:14:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:14:31,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:14:31,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:14:31,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:14:31,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:14:31,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:14:31,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:14:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 23:14:31,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:14:31,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2018-09-30 23:14:31,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:14:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:14:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=445, Unknown=1, NotChecked=0, Total=506 [2018-09-30 23:14:31,943 INFO L87 Difference]: Start difference. First operand 9724 states and 15777 transitions. Second operand 23 states. [2018-09-30 23:14:36,902 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-30 23:14:38,425 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-09-30 23:14:38,869 WARN L178 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2018-09-30 23:14:40,083 WARN L178 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-09-30 23:14:41,202 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-09-30 23:14:42,073 WARN L178 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-30 23:14:42,676 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-09-30 23:14:44,063 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-30 23:14:46,027 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-09-30 23:14:47,011 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-30 23:14:48,874 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-09-30 23:14:51,561 WARN L178 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-09-30 23:14:52,760 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-09-30 23:14:54,973 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-09-30 23:14:56,122 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-09-30 23:14:57,518 WARN L178 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2018-09-30 23:14:59,118 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-09-30 23:15:00,074 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-09-30 23:15:00,849 WARN L178 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-30 23:15:01,750 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2018-09-30 23:15:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:15:07,220 INFO L93 Difference]: Finished difference Result 21592 states and 35251 transitions. [2018-09-30 23:15:07,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2018-09-30 23:15:07,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2018-09-30 23:15:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:15:07,244 INFO L225 Difference]: With dead ends: 21592 [2018-09-30 23:15:07,244 INFO L226 Difference]: Without dead ends: 21590 [2018-09-30 23:15:07,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16849 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=7431, Invalid=37300, Unknown=1, NotChecked=0, Total=44732 [2018-09-30 23:15:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21590 states. [2018-09-30 23:15:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21590 to 9161. [2018-09-30 23:15:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9161 states. [2018-09-30 23:15:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 14723 transitions. [2018-09-30 23:15:14,076 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 14723 transitions. Word has length 25 [2018-09-30 23:15:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:15:14,077 INFO L480 AbstractCegarLoop]: Abstraction has 9161 states and 14723 transitions. [2018-09-30 23:15:14,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:15:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 14723 transitions. [2018-09-30 23:15:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:15:14,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:15:14,080 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:15:14,080 INFO L423 AbstractCegarLoop]: === Iteration 74 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:15:14,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:15:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1379928425, now seen corresponding path program 1 times [2018-09-30 23:15:14,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:15:14,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:15:14,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:14,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:15:14,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 23:15:14,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:15:14,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:15:14,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:14,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:15:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:15:14,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:15:14,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-09-30 23:15:14,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:15:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:15:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:15:14,533 INFO L87 Difference]: Start difference. First operand 9161 states and 14723 transitions. Second operand 13 states. [2018-09-30 23:15:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:15:25,879 INFO L93 Difference]: Finished difference Result 19257 states and 30794 transitions. [2018-09-30 23:15:25,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:15:25,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-30 23:15:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:15:25,889 INFO L225 Difference]: With dead ends: 19257 [2018-09-30 23:15:25,889 INFO L226 Difference]: Without dead ends: 11655 [2018-09-30 23:15:25,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:15:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11655 states. [2018-09-30 23:15:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11655 to 10147. [2018-09-30 23:15:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10147 states. [2018-09-30 23:15:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10147 states to 10147 states and 16296 transitions. [2018-09-30 23:15:33,821 INFO L78 Accepts]: Start accepts. Automaton has 10147 states and 16296 transitions. Word has length 25 [2018-09-30 23:15:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:15:33,821 INFO L480 AbstractCegarLoop]: Abstraction has 10147 states and 16296 transitions. [2018-09-30 23:15:33,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:15:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 10147 states and 16296 transitions. [2018-09-30 23:15:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:15:33,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:15:33,825 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:15:33,825 INFO L423 AbstractCegarLoop]: === Iteration 75 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:15:33,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:15:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash -153022121, now seen corresponding path program 2 times [2018-09-30 23:15:33,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:15:33,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:15:33,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:33,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:33,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:15:33,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:15:33,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:15:33,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:15:34,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:15:34,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:15:34,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:15:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:15:34,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:15:34,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-30 23:15:34,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:15:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:15:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:15:34,087 INFO L87 Difference]: Start difference. First operand 10147 states and 16296 transitions. Second operand 13 states. [2018-09-30 23:15:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:15:44,576 INFO L93 Difference]: Finished difference Result 22403 states and 35753 transitions. [2018-09-30 23:15:44,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:15:44,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-30 23:15:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:15:44,587 INFO L225 Difference]: With dead ends: 22403 [2018-09-30 23:15:44,587 INFO L226 Difference]: Without dead ends: 12030 [2018-09-30 23:15:44,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:15:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12030 states. [2018-09-30 23:15:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12030 to 11023. [2018-09-30 23:15:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11023 states. [2018-09-30 23:15:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11023 states to 11023 states and 17560 transitions. [2018-09-30 23:15:53,132 INFO L78 Accepts]: Start accepts. Automaton has 11023 states and 17560 transitions. Word has length 25 [2018-09-30 23:15:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:15:53,132 INFO L480 AbstractCegarLoop]: Abstraction has 11023 states and 17560 transitions. [2018-09-30 23:15:53,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:15:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11023 states and 17560 transitions. [2018-09-30 23:15:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:15:53,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:15:53,136 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:15:53,136 INFO L423 AbstractCegarLoop]: === Iteration 76 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:15:53,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:15:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 936691172, now seen corresponding path program 1 times [2018-09-30 23:15:53,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:15:53,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:15:53,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:53,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:15:53,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:15:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:15:53,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:15:53,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:15:53,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:15:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:15:53,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:15:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:15:53,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:15:53,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2018-09-30 23:15:53,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:15:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:15:53,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:15:53,516 INFO L87 Difference]: Start difference. First operand 11023 states and 17560 transitions. Second operand 23 states. [2018-09-30 23:16:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:16:09,473 INFO L93 Difference]: Finished difference Result 12152 states and 19330 transitions. [2018-09-30 23:16:09,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:16:09,473 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2018-09-30 23:16:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:16:09,484 INFO L225 Difference]: With dead ends: 12152 [2018-09-30 23:16:09,484 INFO L226 Difference]: Without dead ends: 12150 [2018-09-30 23:16:09,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1623, Invalid=10367, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:16:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2018-09-30 23:16:18,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10960. [2018-09-30 23:16:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10960 states. [2018-09-30 23:16:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10960 states to 10960 states and 17412 transitions. [2018-09-30 23:16:18,471 INFO L78 Accepts]: Start accepts. Automaton has 10960 states and 17412 transitions. Word has length 25 [2018-09-30 23:16:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:16:18,471 INFO L480 AbstractCegarLoop]: Abstraction has 10960 states and 17412 transitions. [2018-09-30 23:16:18,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:16:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10960 states and 17412 transitions. [2018-09-30 23:16:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:16:18,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:16:18,475 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 23:16:18,475 INFO L423 AbstractCegarLoop]: === Iteration 77 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:16:18,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:16:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash 998547776, now seen corresponding path program 2 times [2018-09-30 23:16:18,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:16:18,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:16:18,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:18,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:16:18,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:16:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:16:18,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:16:18,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:16:18,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:16:18,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:16:18,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:16:18,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:16:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:16:18,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:16:18,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2018-09-30 23:16:18,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:16:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:16:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:16:18,946 INFO L87 Difference]: Start difference. First operand 10960 states and 17412 transitions. Second operand 26 states. [2018-09-30 23:16:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:16:43,263 INFO L93 Difference]: Finished difference Result 15598 states and 25018 transitions. [2018-09-30 23:16:43,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:16:43,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 23:16:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:16:43,278 INFO L225 Difference]: With dead ends: 15598 [2018-09-30 23:16:43,278 INFO L226 Difference]: Without dead ends: 15588 [2018-09-30 23:16:43,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10191 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5362, Invalid=22028, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:16:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15588 states. [2018-09-30 23:16:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15588 to 9450. [2018-09-30 23:16:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9450 states. [2018-09-30 23:16:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9450 states to 9450 states and 15034 transitions. [2018-09-30 23:16:52,614 INFO L78 Accepts]: Start accepts. Automaton has 9450 states and 15034 transitions. Word has length 26 [2018-09-30 23:16:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:16:52,614 INFO L480 AbstractCegarLoop]: Abstraction has 9450 states and 15034 transitions. [2018-09-30 23:16:52,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:16:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9450 states and 15034 transitions. [2018-09-30 23:16:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:16:52,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:16:52,619 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 23:16:52,619 INFO L423 AbstractCegarLoop]: === Iteration 78 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:16:52,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:16:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash 604672123, now seen corresponding path program 2 times [2018-09-30 23:16:52,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:16:52,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:16:52,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:52,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:16:52,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:16:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:16:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:16:52,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:16:52,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:16:52,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:16:52,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:16:52,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:16:52,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:16:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:16:53,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:16:53,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 22 [2018-09-30 23:16:53,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:16:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:16:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:16:53,027 INFO L87 Difference]: Start difference. First operand 9450 states and 15034 transitions. Second operand 23 states. [2018-09-30 23:17:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:19,936 INFO L93 Difference]: Finished difference Result 17168 states and 27398 transitions. [2018-09-30 23:17:19,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:17:19,936 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2018-09-30 23:17:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:19,949 INFO L225 Difference]: With dead ends: 17168 [2018-09-30 23:17:19,950 INFO L226 Difference]: Without dead ends: 17157 [2018-09-30 23:17:19,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1675, Invalid=6335, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:17:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17157 states. [2018-09-30 23:17:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17157 to 9292. [2018-09-30 23:17:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9292 states. [2018-09-30 23:17:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 14790 transitions. [2018-09-30 23:17:29,182 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 14790 transitions. Word has length 26 [2018-09-30 23:17:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:17:29,183 INFO L480 AbstractCegarLoop]: Abstraction has 9292 states and 14790 transitions. [2018-09-30 23:17:29,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:17:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 14790 transitions. [2018-09-30 23:17:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:17:29,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:17:29,186 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:17:29,187 INFO L423 AbstractCegarLoop]: === Iteration 79 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:17:29,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:17:29,187 INFO L82 PathProgramCache]: Analyzing trace with hash -951541235, now seen corresponding path program 1 times [2018-09-30 23:17:29,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:17:29,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:17:29,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:29,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:17:29,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:17:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:17:29,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:17:29,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:17:29,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:17:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:17:29,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:17:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 23:17:29,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:17:29,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2018-09-30 23:17:29,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:17:29,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:17:29,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:17:29,671 INFO L87 Difference]: Start difference. First operand 9292 states and 14790 transitions. Second operand 25 states. [2018-09-30 23:17:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:17:53,364 INFO L93 Difference]: Finished difference Result 14070 states and 22411 transitions. [2018-09-30 23:17:53,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:17:53,365 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2018-09-30 23:17:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:17:53,377 INFO L225 Difference]: With dead ends: 14070 [2018-09-30 23:17:53,377 INFO L226 Difference]: Without dead ends: 14060 [2018-09-30 23:17:53,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4970 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2101, Invalid=11239, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:17:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14060 states. [2018-09-30 23:18:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14060 to 9083. [2018-09-30 23:18:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9083 states. [2018-09-30 23:18:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9083 states to 9083 states and 14423 transitions. [2018-09-30 23:18:02,577 INFO L78 Accepts]: Start accepts. Automaton has 9083 states and 14423 transitions. Word has length 26 [2018-09-30 23:18:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:02,578 INFO L480 AbstractCegarLoop]: Abstraction has 9083 states and 14423 transitions. [2018-09-30 23:18:02,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:18:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9083 states and 14423 transitions. [2018-09-30 23:18:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:18:02,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:02,580 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1] [2018-09-30 23:18:02,581 INFO L423 AbstractCegarLoop]: === Iteration 80 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:02,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash 954413256, now seen corresponding path program 8 times [2018-09-30 23:18:02,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:02,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:02,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:18:02,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:02,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:02,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:02,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:18:02,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:18:02,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:02,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:03,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:03,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2018-09-30 23:18:03,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:18:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:18:03,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2018-09-30 23:18:03,705 INFO L87 Difference]: Start difference. First operand 9083 states and 14423 transitions. Second operand 18 states. [2018-09-30 23:18:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:18:21,256 INFO L93 Difference]: Finished difference Result 10578 states and 16824 transitions. [2018-09-30 23:18:21,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:18:21,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2018-09-30 23:18:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:18:21,265 INFO L225 Difference]: With dead ends: 10578 [2018-09-30 23:18:21,265 INFO L226 Difference]: Without dead ends: 10576 [2018-09-30 23:18:21,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=448, Invalid=1704, Unknown=10, NotChecked=0, Total=2162 [2018-09-30 23:18:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10576 states. [2018-09-30 23:18:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10576 to 9430. [2018-09-30 23:18:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9430 states. [2018-09-30 23:18:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9430 states to 9430 states and 14964 transitions. [2018-09-30 23:18:30,771 INFO L78 Accepts]: Start accepts. Automaton has 9430 states and 14964 transitions. Word has length 27 [2018-09-30 23:18:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:18:30,772 INFO L480 AbstractCegarLoop]: Abstraction has 9430 states and 14964 transitions. [2018-09-30 23:18:30,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:18:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9430 states and 14964 transitions. [2018-09-30 23:18:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:18:30,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:18:30,774 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1] [2018-09-30 23:18:30,775 INFO L423 AbstractCegarLoop]: === Iteration 81 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:18:30,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:18:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash -930994090, now seen corresponding path program 9 times [2018-09-30 23:18:30,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:18:30,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:18:30,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:30,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:18:30,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:18:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:18:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:18:30,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:18:30,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:18:30,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:18:30,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:18:30,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:18:30,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:18:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:18:31,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:18:31,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-09-30 23:18:31,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:18:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:18:31,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:18:31,165 INFO L87 Difference]: Start difference. First operand 9430 states and 14964 transitions. Second operand 24 states. [2018-09-30 23:19:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:05,566 INFO L93 Difference]: Finished difference Result 29552 states and 46700 transitions. [2018-09-30 23:19:05,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2018-09-30 23:19:05,566 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-09-30 23:19:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:05,584 INFO L225 Difference]: With dead ends: 29552 [2018-09-30 23:19:05,584 INFO L226 Difference]: Without dead ends: 20062 [2018-09-30 23:19:05,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 21617 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5052, Invalid=47160, Unknown=0, NotChecked=0, Total=52212 [2018-09-30 23:19:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20062 states. [2018-09-30 23:19:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20062 to 12330. [2018-09-30 23:19:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12330 states. [2018-09-30 23:19:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12330 states to 12330 states and 19559 transitions. [2018-09-30 23:19:18,841 INFO L78 Accepts]: Start accepts. Automaton has 12330 states and 19559 transitions. Word has length 27 [2018-09-30 23:19:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:18,841 INFO L480 AbstractCegarLoop]: Abstraction has 12330 states and 19559 transitions. [2018-09-30 23:19:18,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:19:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 12330 states and 19559 transitions. [2018-09-30 23:19:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:19:18,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:18,844 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1] [2018-09-30 23:19:18,844 INFO L423 AbstractCegarLoop]: === Iteration 82 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:18,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1947971206, now seen corresponding path program 10 times [2018-09-30 23:19:18,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:18,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:18,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:18,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:18,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:18,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:18,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:18,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:19,002 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:19,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:19,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:19:19,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:19,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-09-30 23:19:19,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:19:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:19:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:19,422 INFO L87 Difference]: Start difference. First operand 12330 states and 19559 transitions. Second operand 24 states. [2018-09-30 23:19:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:55,655 INFO L93 Difference]: Finished difference Result 29512 states and 46660 transitions. [2018-09-30 23:19:55,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-09-30 23:19:55,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-09-30 23:19:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:55,670 INFO L225 Difference]: With dead ends: 29512 [2018-09-30 23:19:55,671 INFO L226 Difference]: Without dead ends: 17210 [2018-09-30 23:19:55,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 16595 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4080, Invalid=36522, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:19:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17210 states. [2018-09-30 23:20:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17210 to 12870. [2018-09-30 23:20:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12870 states. [2018-09-30 23:20:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12870 states to 12870 states and 20431 transitions. [2018-09-30 23:20:10,157 INFO L78 Accepts]: Start accepts. Automaton has 12870 states and 20431 transitions. Word has length 27 [2018-09-30 23:20:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:10,157 INFO L480 AbstractCegarLoop]: Abstraction has 12870 states and 20431 transitions. [2018-09-30 23:20:10,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:20:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 12870 states and 20431 transitions. [2018-09-30 23:20:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:20:10,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:10,160 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1] [2018-09-30 23:20:10,160 INFO L423 AbstractCegarLoop]: === Iteration 83 === [productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:10,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:10,160 INFO L82 PathProgramCache]: Analyzing trace with hash 643907934, now seen corresponding path program 11 times [2018-09-30 23:20:10,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:10,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:10,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:10,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:10,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:10,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:10,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:10,461 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:10,478 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 23:20:10,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:10,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:20:10,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:10,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-30 23:20:10,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:20:10,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:20:10,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:20:10,685 INFO L87 Difference]: Start difference. First operand 12870 states and 20431 transitions. Second operand 23 states. [2018-09-30 23:20:32,474 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 Received shutdown request... [2018-09-30 23:20:32,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-09-30 23:20:32,582 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:20:32,587 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:20:32,588 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:20:32 BoogieIcfgContainer [2018-09-30 23:20:32,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:20:32,589 INFO L168 Benchmark]: Toolchain (without parser) took 832774.05 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 3.1 GB in the end (delta: -1.6 GB). Peak memory consumption was 359.6 MB. Max. memory is 7.1 GB. [2018-09-30 23:20:32,589 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 23:20:32,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.15 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 23:20:32,593 INFO L168 Benchmark]: Boogie Preprocessor took 21.36 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 23:20:32,593 INFO L168 Benchmark]: RCFGBuilder took 565.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:20:32,594 INFO L168 Benchmark]: TraceAbstraction took 832139.60 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 3.1 GB in the end (delta: -1.6 GB). Peak memory consumption was 338.4 MB. Max. memory is 7.1 GB. [2018-09-30 23:20:32,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.15 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 21.36 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 565.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 832139.60 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 3.1 GB in the end (delta: -1.6 GB). Peak memory consumption was 338.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 58). Cancelled while BasicCegarLoop was constructing difference of abstraction (12870states) and FLOYD_HOARE automaton (currently 191 states, 23 states before enhancement), while ReachableStatesComputation was computing reachable states (8396 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 69). Cancelled while BasicCegarLoop was constructing difference of abstraction (12870states) and FLOYD_HOARE automaton (currently 191 states, 23 states before enhancement), while ReachableStatesComputation was computing reachable states (8396 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 78). Cancelled while BasicCegarLoop was constructing difference of abstraction (12870states) and FLOYD_HOARE automaton (currently 191 states, 23 states before enhancement), while ReachableStatesComputation was computing reachable states (8396 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was constructing difference of abstraction (12870states) and FLOYD_HOARE automaton (currently 191 states, 23 states before enhancement), while ReachableStatesComputation was computing reachable states (8396 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 4 error locations. TIMEOUT Result, 832.0s OverallTime, 83 OverallIterations, 5 TraceHistogramMax, 598.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2981 SDtfs, 18027 SDslu, 11695 SDs, 0 SdLazy, 109178 SolverSat, 14082 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 108.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6200 GetRequests, 884 SyntacticMatches, 34 SemanticMatches, 5282 ConstructedPredicates, 0 IntricatePredicates, 13 DeprecatedPredicates, 211533 ImplicationChecksByTransitivity, 166.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12870occurred in iteration=82, 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: 201.8s AutomataMinimizationTime, 82 MinimizatonAttempts, 124733 StatesRemovedByMinimization, 82 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 27.9s InterpolantComputationTime, 2652 NumberOfCodeBlocks, 2643 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 2494 ConstructedInterpolants, 226 QuantifiedInterpolants, 349764 SizeOfPredicates, 348 NumberOfNonLiveVariables, 3900 ConjunctsInSsa, 783 ConjunctsInUnsatCore, 158 InterpolantComputations, 9 PerfectInterpolantSequences, 563/2282 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_WithoutIf.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-20-32-610.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithoutIf.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-20-32-610.csv Completed graceful shutdown