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_PUPT.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:40:34,850 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:40:34,852 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:40:34,872 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:40:34,872 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:40:34,873 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:40:34,875 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:40:34,878 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:40:34,880 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:40:34,882 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:40:34,882 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:40:34,883 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:40:34,884 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:40:34,885 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:40:34,886 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:40:34,887 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:40:34,887 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:40:34,889 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:40:34,891 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:40:34,893 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:40:34,894 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:40:34,895 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:40:34,898 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:40:34,907 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:40:34,928 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:40:34,929 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:40:34,930 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:40:34,930 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:40:34,930 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:40:34,931 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:40:34,931 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:40:34,931 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:40:34,931 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:40:34,932 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:40:34,933 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:40:34,933 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:40:34,933 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:40:34,933 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:40:34,933 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:40:34,934 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:40:34,934 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:40:34,934 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:40:34,934 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:40:34,936 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:40:34,936 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:40:34,936 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:40:34,936 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:40:34,936 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:40:34,937 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:40:34,937 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:40:34,937 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:40:34,937 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:40:34,937 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:40:34,938 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:40:34,938 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:40:34,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:40:35,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:40:35,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:40:35,010 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:40:35,010 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:40:35,011 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-26 21:40:35,011 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-26 21:40:35,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:40:35,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:40:35,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:40:35,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:40:35,094 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:40:35,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:40:35,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:40:35,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:40:35,138 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:40:35,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... [2018-09-26 21:40:35,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:40:35,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:40:35,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:40:35,163 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:40:35,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:40:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-26 21:40:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-26 21:40:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-26 21:40:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-26 21:40:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-26 21:40:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-26 21:40:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:40:35,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:40:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-26 21:40:35,249 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-26 21:40:35,843 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:40:35,844 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:40:35 BoogieIcfgContainer [2018-09-26 21:40:35,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:40:35,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:40:35,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:40:35,849 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:40:35,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:40:35" (1/2) ... [2018-09-26 21:40:35,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a54cf6 and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:40:35, skipping insertion in model container [2018-09-26 21:40:35,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:40:35" (2/2) ... [2018-09-26 21:40:35,853 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-26 21:40:35,863 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:40:35,873 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-26 21:40:35,935 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:40:35,936 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:40:35,936 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:40:35,937 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:40:35,937 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:40:35,937 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:40:35,937 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:40:35,937 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:40:35,938 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:40:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-26 21:40:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:40:35,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:35,975 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:35,976 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:35,984 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-26 21:40:35,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:35,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:36,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:36,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:36,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:36,355 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:40:36,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:40:36,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:40:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:40:36,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:36,375 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-26 21:40:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:38,408 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-26 21:40:38,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:40:38,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-26 21:40:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:38,422 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:40:38,422 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:40:38,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:40:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-26 21:40:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:40:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-26 21:40:38,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-26 21:40:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:38,474 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-26 21:40:38,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:40:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-26 21:40:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:40:38,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:38,475 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:38,476 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:38,476 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-26 21:40:38,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:38,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:38,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:38,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:38,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:38,586 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:40:38,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:40:38,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:40:38,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:40:38,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:38,589 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-26 21:40:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:39,492 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-26 21:40:39,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:40:39,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-26 21:40:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:39,505 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:40:39,505 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:40:39,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:40:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-26 21:40:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:40:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-26 21:40:39,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-26 21:40:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:39,529 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-26 21:40:39,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:40:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-26 21:40:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:40:39,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:39,534 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:39,535 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:39,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-26 21:40:39,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:39,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:39,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:39,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:39,694 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:40:39,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-26 21:40:39,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:40:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:40:39,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:39,696 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-26 21:40:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:42,223 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-26 21:40:42,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:40:42,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-26 21:40:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:42,229 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:40:42,229 INFO L226 Difference]: Without dead ends: 120 [2018-09-26 21:40:42,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-26 21:40:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-26 21:40:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:40:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-26 21:40:42,247 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-26 21:40:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:42,248 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-26 21:40:42,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:40:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-26 21:40:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:40:42,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:42,250 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:42,251 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:42,251 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-26 21:40:42,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:42,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:42,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:42,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:42,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:42,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:40:42,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:40:42,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:42,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:40:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:42,674 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:40:42,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-26 21:40:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:40:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:40:42,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:42,676 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-26 21:40:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:46,445 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-26 21:40:46,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:40:46,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-26 21:40:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:46,448 INFO L225 Difference]: With dead ends: 168 [2018-09-26 21:40:46,448 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:40:46,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:40:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-26 21:40:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:40:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-26 21:40:46,469 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-26 21:40:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:46,469 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-26 21:40:46,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:40:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-26 21:40:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:40:46,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:46,471 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:46,472 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:46,472 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-26 21:40:46,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:46,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:46,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:46,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:46,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:46,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:40:46,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:40:46,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:46,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:40:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:46,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:40:46,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-26 21:40:46,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:40:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:40:46,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:46,760 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-26 21:40:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:48,682 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-26 21:40:48,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:40:48,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-26 21:40:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:48,684 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:40:48,685 INFO L226 Difference]: Without dead ends: 162 [2018-09-26 21:40:48,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-26 21:40:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-26 21:40:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:40:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-26 21:40:48,705 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-26 21:40:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:48,706 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-26 21:40:48,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:40:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-26 21:40:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:40:48,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:48,708 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:48,708 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:48,708 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-26 21:40:48,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:48,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:48,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:48,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:48,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:48,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:40:48,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:40:48,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:48,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:40:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:48,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:40:48,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-26 21:40:48,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:40:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:40:48,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:48,955 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-26 21:40:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:51,383 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-26 21:40:51,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:40:51,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-26 21:40:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:51,388 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:40:51,388 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:40:51,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:40:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-26 21:40:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:40:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-26 21:40:51,412 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-26 21:40:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:51,413 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-26 21:40:51,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:40:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-26 21:40:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:40:51,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:51,415 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:51,415 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:51,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-26 21:40:51,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:51,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:51,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:51,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:51,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:51,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:40:51,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:40:51,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:51,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:40:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:51,719 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:40:51,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-26 21:40:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:40:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:40:51,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:51,720 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-26 21:40:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:53,701 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-26 21:40:53,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:40:53,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-26 21:40:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:53,703 INFO L225 Difference]: With dead ends: 217 [2018-09-26 21:40:53,703 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:40:53,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:40:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-26 21:40:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:40:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-26 21:40:53,727 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-26 21:40:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:53,727 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-26 21:40:53,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:40:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-26 21:40:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:40:53,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:53,729 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:53,729 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:53,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-26 21:40:53,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:53,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:53,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:53,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:53,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:53,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:40:53,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:40:53,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:53,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:40:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:54,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:40:54,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-26 21:40:54,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:40:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:40:54,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:54,089 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-26 21:40:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:40:58,234 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-26 21:40:58,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:40:58,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-26 21:40:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:40:58,240 INFO L225 Difference]: With dead ends: 194 [2018-09-26 21:40:58,241 INFO L226 Difference]: Without dead ends: 192 [2018-09-26 21:40:58,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:40:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-26 21:40:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-26 21:40:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:40:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-26 21:40:58,287 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-26 21:40:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:40:58,287 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-26 21:40:58,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:40:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-26 21:40:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:40:58,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:40:58,290 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:40:58,290 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:40:58,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:40:58,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-26 21:40:58,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:40:58,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:40:58,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:58,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:58,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:40:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:58,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:40:58,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:40:58,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:40:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:40:58,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:40:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:40:59,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:40:59,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-26 21:40:59,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:40:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:40:59,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:40:59,046 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-26 21:41:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:03,785 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-26 21:41:03,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:41:03,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:41:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:03,788 INFO L225 Difference]: With dead ends: 246 [2018-09-26 21:41:03,788 INFO L226 Difference]: Without dead ends: 244 [2018-09-26 21:41:03,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-26 21:41:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-26 21:41:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:41:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-26 21:41:03,821 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-26 21:41:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:03,822 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-26 21:41:03,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:41:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-26 21:41:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:03,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:03,823 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:03,824 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:03,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:03,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-26 21:41:03,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:03,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:03,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:03,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:03,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:03,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:03,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:03,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:03,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:04,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:04,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-26 21:41:04,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:41:04,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:41:04,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:04,233 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-26 21:41:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:09,840 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-26 21:41:09,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:41:09,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:41:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:09,850 INFO L225 Difference]: With dead ends: 288 [2018-09-26 21:41:09,850 INFO L226 Difference]: Without dead ends: 286 [2018-09-26 21:41:09,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-26 21:41:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-26 21:41:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-26 21:41:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-26 21:41:09,884 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-26 21:41:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:09,884 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-26 21:41:09,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:41:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-26 21:41:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:09,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:09,885 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:09,886 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:09,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:09,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-26 21:41:09,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:09,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:09,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:09,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:09,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:09,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:09,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:09,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:10,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:10,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:10,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-26 21:41:10,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:41:10,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:41:10,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:10,161 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-26 21:41:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:13,831 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-26 21:41:13,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:41:13,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:41:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:13,841 INFO L225 Difference]: With dead ends: 314 [2018-09-26 21:41:13,841 INFO L226 Difference]: Without dead ends: 312 [2018-09-26 21:41:13,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-26 21:41:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-26 21:41:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-26 21:41:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-26 21:41:13,885 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-26 21:41:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:13,886 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-26 21:41:13,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:41:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-26 21:41:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:13,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:13,887 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:13,887 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:13,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:13,887 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-26 21:41:13,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:13,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:13,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:13,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:13,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:13,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:13,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:13,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:14,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:14,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:14,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-26 21:41:14,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:41:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:41:14,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:14,138 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-26 21:41:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:17,276 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-26 21:41:17,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:41:17,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-26 21:41:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:17,286 INFO L225 Difference]: With dead ends: 322 [2018-09-26 21:41:17,286 INFO L226 Difference]: Without dead ends: 320 [2018-09-26 21:41:17,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-26 21:41:17,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-26 21:41:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-26 21:41:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-26 21:41:17,350 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-26 21:41:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:17,350 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-26 21:41:17,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:41:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-26 21:41:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:17,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:17,354 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:17,354 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:17,355 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-26 21:41:17,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:17,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:17,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:17,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:17,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:17,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:17,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:17,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:17,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:17,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:17,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-26 21:41:17,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:41:17,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:41:17,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:17,650 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-26 21:41:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:22,074 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-26 21:41:22,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:41:22,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:41:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:22,079 INFO L225 Difference]: With dead ends: 378 [2018-09-26 21:41:22,080 INFO L226 Difference]: Without dead ends: 376 [2018-09-26 21:41:22,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-26 21:41:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-26 21:41:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-26 21:41:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-26 21:41:22,132 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-26 21:41:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:22,132 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-26 21:41:22,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:41:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-26 21:41:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:22,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:22,133 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:22,133 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:22,134 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-26 21:41:22,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:22,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:22,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:22,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:22,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:22,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:22,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:22,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:22,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:22,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:22,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 15 [2018-09-26 21:41:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:41:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:41:22,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:22,463 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 16 states. [2018-09-26 21:41:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:28,947 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-26 21:41:28,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:41:28,947 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2018-09-26 21:41:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:28,950 INFO L225 Difference]: With dead ends: 395 [2018-09-26 21:41:28,950 INFO L226 Difference]: Without dead ends: 393 [2018-09-26 21:41:28,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-26 21:41:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-26 21:41:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-26 21:41:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-26 21:41:29,017 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-26 21:41:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:29,018 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-26 21:41:29,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:41:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-26 21:41:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:29,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:29,019 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:29,019 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:29,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:29,020 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-26 21:41:29,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:29,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:29,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:29,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:29,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:29,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:29,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:29,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:29,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:29,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:29,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 13 [2018-09-26 21:41:29,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:41:29,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:41:29,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:29,721 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 15 states. [2018-09-26 21:41:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:34,656 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-26 21:41:34,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:41:34,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-26 21:41:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:34,659 INFO L225 Difference]: With dead ends: 383 [2018-09-26 21:41:34,659 INFO L226 Difference]: Without dead ends: 381 [2018-09-26 21:41:34,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-26 21:41:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-26 21:41:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-26 21:41:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-26 21:41:34,717 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-26 21:41:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:34,717 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-26 21:41:34,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:41:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-26 21:41:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:41:34,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:34,718 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:34,718 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:34,719 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-26 21:41:34,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:34,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:34,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:34,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:34,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:34,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:34,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:34,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:34,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:35,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:35,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-26 21:41:35,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:41:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:41:35,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:35,079 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-26 21:41:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:39,743 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-26 21:41:39,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:41:39,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-26 21:41:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:39,746 INFO L225 Difference]: With dead ends: 429 [2018-09-26 21:41:39,746 INFO L226 Difference]: Without dead ends: 427 [2018-09-26 21:41:39,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-26 21:41:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-26 21:41:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-26 21:41:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-26 21:41:39,808 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-26 21:41:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:39,808 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-26 21:41:39,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:41:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-26 21:41:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:41:39,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:39,809 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:39,810 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:39,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-26 21:41:39,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:39,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:39,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:40,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:40,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:40,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:40,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:40,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:41,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-26 21:41:41,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:41:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:41:41,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:41,000 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-26 21:41:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:45,490 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-26 21:41:45,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:41:45,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-26 21:41:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:45,492 INFO L225 Difference]: With dead ends: 330 [2018-09-26 21:41:45,493 INFO L226 Difference]: Without dead ends: 328 [2018-09-26 21:41:45,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-26 21:41:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-26 21:41:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-26 21:41:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-26 21:41:45,549 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-26 21:41:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:45,549 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-26 21:41:45,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:41:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-26 21:41:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:41:45,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:45,550 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:45,551 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:45,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:45,551 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-26 21:41:45,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:45,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:46,165 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) [2018-09-26 21:41:46,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:46,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:46,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-09-26 21:41:46,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:41:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:41:46,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:46,338 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 13 states. [2018-09-26 21:41:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:48,732 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-26 21:41:48,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:41:48,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:41:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:48,734 INFO L225 Difference]: With dead ends: 271 [2018-09-26 21:41:48,734 INFO L226 Difference]: Without dead ends: 269 [2018-09-26 21:41:48,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-26 21:41:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-26 21:41:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-26 21:41:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-26 21:41:48,790 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-26 21:41:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:48,791 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-26 21:41:48,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:41:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-26 21:41:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:41:48,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:48,792 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:41:48,792 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:48,792 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-26 21:41:48,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:48,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:48,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:48,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:48,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:48,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:48,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:48,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:49,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:49,136 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:41:49,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-26 21:41:49,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:41:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:41:49,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:49,137 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-26 21:41:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:59,944 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-26 21:41:59,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:41:59,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:41:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:59,948 INFO L225 Difference]: With dead ends: 741 [2018-09-26 21:41:59,948 INFO L226 Difference]: Without dead ends: 564 [2018-09-26 21:41:59,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-26 21:42:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-26 21:42:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-26 21:42:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-26 21:42:00,088 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-26 21:42:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:00,088 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-26 21:42:00,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-26 21:42:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:00,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:00,089 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:00,089 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:00,090 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-26 21:42:00,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:00,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:00,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:00,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:00,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:00,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:00,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:00,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:00,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:00,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:00,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-26 21:42:00,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:00,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:00,467 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-26 21:42:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:05,225 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-26 21:42:05,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:42:05,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:05,234 INFO L225 Difference]: With dead ends: 809 [2018-09-26 21:42:05,234 INFO L226 Difference]: Without dead ends: 470 [2018-09-26 21:42:05,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-26 21:42:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-26 21:42:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-26 21:42:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-26 21:42:05,382 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-26 21:42:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:05,383 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-26 21:42:05,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-26 21:42:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:05,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:05,384 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:05,385 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:05,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-26 21:42:05,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:05,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:05,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:05,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:05,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:05,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:05,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:05,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:06,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:06,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:06,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:42:06,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:06,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:06,115 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-26 21:42:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:12,491 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-26 21:42:12,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:42:12,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:12,495 INFO L225 Difference]: With dead ends: 1106 [2018-09-26 21:42:12,495 INFO L226 Difference]: Without dead ends: 724 [2018-09-26 21:42:12,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-26 21:42:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-26 21:42:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-26 21:42:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-26 21:42:12,679 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-26 21:42:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:12,679 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-26 21:42:12,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-26 21:42:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:12,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:12,680 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:12,680 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:12,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-26 21:42:12,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:12,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:12,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:12,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:12,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:12,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:12,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:12,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:12,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:12,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:12,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-26 21:42:12,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:42:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:42:12,947 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:12,948 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-26 21:42:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:15,612 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-26 21:42:15,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:42:15,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-26 21:42:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:15,618 INFO L225 Difference]: With dead ends: 711 [2018-09-26 21:42:15,619 INFO L226 Difference]: Without dead ends: 709 [2018-09-26 21:42:15,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-26 21:42:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-26 21:42:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-26 21:42:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-26 21:42:15,813 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-26 21:42:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:15,813 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-26 21:42:15,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:42:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-26 21:42:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:15,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:15,814 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:15,814 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:15,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-26 21:42:15,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:15,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:15,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:15,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:15,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:15,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:15,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:15,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:16,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:16,127 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:42:16,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-26 21:42:16,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:16,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:16,128 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-26 21:42:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:20,594 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-26 21:42:20,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:42:20,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:20,598 INFO L225 Difference]: With dead ends: 1319 [2018-09-26 21:42:20,598 INFO L226 Difference]: Without dead ends: 823 [2018-09-26 21:42:20,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-26 21:42:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-26 21:42:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-26 21:42:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-26 21:42:20,845 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-26 21:42:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:20,846 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-26 21:42:20,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-26 21:42:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:20,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:20,847 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:20,847 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:20,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-26 21:42:20,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:20,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:20,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:20,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:20,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:21,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:21,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:21,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:21,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:21,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:21,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-09-26 21:42:21,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:21,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:21,454 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 13 states. [2018-09-26 21:42:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:23,913 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-26 21:42:23,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:42:23,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:23,916 INFO L225 Difference]: With dead ends: 766 [2018-09-26 21:42:23,916 INFO L226 Difference]: Without dead ends: 764 [2018-09-26 21:42:23,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-26 21:42:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-26 21:42:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-26 21:42:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-26 21:42:24,143 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-26 21:42:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:24,143 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-26 21:42:24,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-26 21:42:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:24,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:24,144 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:24,144 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:24,145 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-26 21:42:24,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:24,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:24,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:24,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:24,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:24,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:24,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:24,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:24,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:24,958 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:42:24,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-26 21:42:24,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:24,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:24,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:24,959 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-26 21:42:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:35,757 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-26 21:42:35,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:42:35,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:35,762 INFO L225 Difference]: With dead ends: 2095 [2018-09-26 21:42:35,762 INFO L226 Difference]: Without dead ends: 1329 [2018-09-26 21:42:35,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-26 21:42:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-26 21:42:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-26 21:42:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-26 21:42:36,109 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-26 21:42:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:36,109 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-26 21:42:36,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-26 21:42:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:36,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:36,110 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:36,110 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:36,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-26 21:42:36,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:36,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:36,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:36,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:36,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:36,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:36,462 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 [2018-09-26 21:42:36,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:36,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:36,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:36,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-26 21:42:36,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:42:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:42:36,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:36,613 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-26 21:42:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:40,080 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-26 21:42:40,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:42:40,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-26 21:42:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:40,085 INFO L225 Difference]: With dead ends: 1291 [2018-09-26 21:42:40,085 INFO L226 Difference]: Without dead ends: 1289 [2018-09-26 21:42:40,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-26 21:42:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-26 21:42:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-26 21:42:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-26 21:42:40,420 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-26 21:42:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:40,420 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-26 21:42:40,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:42:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-26 21:42:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:40,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:40,421 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:40,422 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:40,422 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-26 21:42:40,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:40,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:40,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:40,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:40,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:40,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:40,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:40,732 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-26 21:42:40,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-26 21:42:40,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:40,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:40,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:40,733 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-26 21:42:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:45,388 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-26 21:42:45,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:42:45,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:45,401 INFO L225 Difference]: With dead ends: 2222 [2018-09-26 21:42:45,402 INFO L226 Difference]: Without dead ends: 1132 [2018-09-26 21:42:45,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-26 21:42:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-26 21:42:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-26 21:42:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-26 21:42:45,702 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-26 21:42:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:45,702 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-26 21:42:45,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-26 21:42:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:42:45,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:45,703 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:45,704 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:45,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-26 21:42:45,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:45,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:45,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:45,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:45,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:45,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:45,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:45,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:45,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:46,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:46,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:42:46,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:42:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:42:46,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:46,021 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-26 21:42:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:52,620 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-26 21:42:52,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:42:52,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-26 21:42:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:52,625 INFO L225 Difference]: With dead ends: 1989 [2018-09-26 21:42:52,625 INFO L226 Difference]: Without dead ends: 1130 [2018-09-26 21:42:52,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-26 21:42:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-26 21:42:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-26 21:42:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-26 21:42:52,922 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-26 21:42:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:52,922 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-26 21:42:52,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:42:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-26 21:42:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:42:52,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:52,924 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:52,924 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:52,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-26 21:42:52,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:52,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:53,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:53,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:53,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:53,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:53,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:53,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-26 21:42:53,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:42:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:42:53,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:53,417 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-26 21:42:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:56,766 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-26 21:42:56,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:42:56,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-26 21:42:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:56,771 INFO L225 Difference]: With dead ends: 1022 [2018-09-26 21:42:56,771 INFO L226 Difference]: Without dead ends: 1020 [2018-09-26 21:42:56,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-26 21:42:57,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-26 21:42:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-26 21:42:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-26 21:42:57,067 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-26 21:42:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:57,067 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-26 21:42:57,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:42:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-26 21:42:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:42:57,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:57,068 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:42:57,069 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:57,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-26 21:42:57,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:57,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:57,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:57,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:57,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:57,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:57,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:57,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:57,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:57,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:57,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-26 21:42:57,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:42:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:42:57,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:57,312 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-26 21:43:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:01,414 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-26 21:43:01,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:43:01,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-26 21:43:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:01,419 INFO L225 Difference]: With dead ends: 1127 [2018-09-26 21:43:01,419 INFO L226 Difference]: Without dead ends: 1125 [2018-09-26 21:43:01,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-26 21:43:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-26 21:43:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-26 21:43:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-26 21:43:01,736 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-26 21:43:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:01,736 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-26 21:43:01,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:43:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-26 21:43:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:43:01,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:01,738 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:01,739 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:01,739 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-26 21:43:01,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:01,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:01,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:01,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:01,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:01,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:01,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:01,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:01,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:02,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:02,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:43:02,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:43:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:43:02,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:02,441 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-26 21:43:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:07,548 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-26 21:43:07,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:43:07,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-26 21:43:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:07,552 INFO L225 Difference]: With dead ends: 1127 [2018-09-26 21:43:07,552 INFO L226 Difference]: Without dead ends: 1125 [2018-09-26 21:43:07,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-26 21:43:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-26 21:43:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-26 21:43:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-26 21:43:07,860 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-26 21:43:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:07,861 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-26 21:43:07,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:43:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-26 21:43:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:43:07,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:07,862 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:07,863 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:07,863 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-26 21:43:07,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:07,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:07,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:08,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:08,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:08,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:08,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:08,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:08,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-26 21:43:08,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:43:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:43:08,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:08,276 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-26 21:43:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:13,461 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-26 21:43:13,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:43:13,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-26 21:43:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:13,465 INFO L225 Difference]: With dead ends: 1072 [2018-09-26 21:43:13,465 INFO L226 Difference]: Without dead ends: 1070 [2018-09-26 21:43:13,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-26 21:43:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-26 21:43:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-26 21:43:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-26 21:43:13,754 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-26 21:43:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:13,754 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-26 21:43:13,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:43:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-26 21:43:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:43:13,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:13,756 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:13,756 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:13,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-26 21:43:13,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:13,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:13,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:13,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:13,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:14,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:14,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:14,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:14,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:14,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:14,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-26 21:43:14,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:43:14,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:43:14,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:14,230 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 11 states. [2018-09-26 21:43:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:17,785 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-26 21:43:17,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:43:17,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-26 21:43:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:17,789 INFO L225 Difference]: With dead ends: 1025 [2018-09-26 21:43:17,789 INFO L226 Difference]: Without dead ends: 1023 [2018-09-26 21:43:17,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-26 21:43:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-26 21:43:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-26 21:43:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-26 21:43:18,104 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-26 21:43:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:18,104 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-26 21:43:18,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:43:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-26 21:43:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:43:18,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:18,105 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:18,106 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:18,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-26 21:43:18,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:18,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:18,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:18,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:18,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:18,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:18,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:18,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:18,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:18,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:18,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-26 21:43:18,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:43:18,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:43:18,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:18,513 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-26 21:43:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:23,681 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-26 21:43:23,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:43:23,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-26 21:43:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:23,686 INFO L225 Difference]: With dead ends: 1057 [2018-09-26 21:43:23,687 INFO L226 Difference]: Without dead ends: 1055 [2018-09-26 21:43:23,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-26 21:43:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-26 21:43:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-26 21:43:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-26 21:43:23,998 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-26 21:43:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:23,999 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-26 21:43:23,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:43:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-26 21:43:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:43:24,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:24,000 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:24,000 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:24,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-26 21:43:24,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:24,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:24,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:24,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:24,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:25,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:25,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:25,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:25,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:43:25,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:25,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-26 21:43:25,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:43:25,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:43:25,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:25,685 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-26 21:43:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:33,734 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-26 21:43:33,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:43:33,734 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-26 21:43:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:33,740 INFO L225 Difference]: With dead ends: 1779 [2018-09-26 21:43:33,740 INFO L226 Difference]: Without dead ends: 1507 [2018-09-26 21:43:33,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-26 21:43:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-26 21:43:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-26 21:43:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-26 21:43:34,219 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-26 21:43:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:34,220 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-26 21:43:34,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:43:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-26 21:43:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:43:34,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:34,221 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:34,221 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:34,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-26 21:43:34,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:34,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:34,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:34,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:34,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:34,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:34,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:34,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:34,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:43:34,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:34,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-26 21:43:34,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:43:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:43:34,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:34,673 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-26 21:43:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:42,544 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-26 21:43:42,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:43:42,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-26 21:43:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:42,550 INFO L225 Difference]: With dead ends: 2685 [2018-09-26 21:43:42,550 INFO L226 Difference]: Without dead ends: 1652 [2018-09-26 21:43:42,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-26 21:43:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-26 21:43:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-26 21:43:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-26 21:43:43,045 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-26 21:43:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:43,045 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-26 21:43:43,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:43:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-26 21:43:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:43:43,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:43,047 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:43,047 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:43,047 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-26 21:43:43,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:43,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:43,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:43,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:43,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:43,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:43,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:43,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:43:43,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:43,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-26 21:43:43,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:43:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:43:43,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:43,457 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-26 21:43:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:52,375 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-26 21:43:52,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:43:52,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-26 21:43:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:52,383 INFO L225 Difference]: With dead ends: 2130 [2018-09-26 21:43:52,383 INFO L226 Difference]: Without dead ends: 1946 [2018-09-26 21:43:52,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-26 21:43:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-26 21:43:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-26 21:43:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-26 21:43:53,092 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-26 21:43:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:53,092 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-26 21:43:53,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:43:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-26 21:43:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:43:53,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:53,094 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:43:53,094 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:53,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-26 21:43:53,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:53,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:53,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:53,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:53,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:53,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:53,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:53,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:53,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:43:53,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:53,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-26 21:43:53,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:43:53,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:43:53,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:53,456 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-26 21:44:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:01,761 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-26 21:44:01,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:44:01,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-26 21:44:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:01,770 INFO L225 Difference]: With dead ends: 3372 [2018-09-26 21:44:01,770 INFO L226 Difference]: Without dead ends: 2040 [2018-09-26 21:44:01,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-26 21:44:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-26 21:44:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-26 21:44:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-26 21:44:02,410 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-26 21:44:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:02,410 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-26 21:44:02,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:44:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-26 21:44:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:44:02,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:02,413 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:02,413 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:02,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:02,413 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-26 21:44:02,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:02,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:02,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:02,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:02,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:02,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:02,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:02,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:02,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:02,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:02,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:02,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:02,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-26 21:44:02,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:44:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:44:02,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:02,979 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-26 21:44:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:34,710 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-26 21:44:34,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:44:34,711 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-26 21:44:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:34,719 INFO L225 Difference]: With dead ends: 2646 [2018-09-26 21:44:34,719 INFO L226 Difference]: Without dead ends: 2644 [2018-09-26 21:44:34,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-26 21:44:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-26 21:44:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-26 21:44:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-26 21:44:35,485 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-26 21:44:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:35,485 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-26 21:44:35,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:44:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-26 21:44:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:44:35,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:35,488 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:35,488 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:35,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-26 21:44:35,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:35,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:35,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:35,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:35,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:35,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:35,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:35,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:35,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:35,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:35,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:36,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:36,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-26 21:44:36,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:44:36,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:44:36,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:36,104 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. Received shutdown request... [2018-09-26 21:44:43,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:44:43,998 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:44:44,150 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:44:44,150 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:44:44 BoogieIcfgContainer [2018-09-26 21:44:44,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:44:44,151 INFO L168 Benchmark]: Toolchain (without parser) took 249061.51 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 888.7 MB). Free memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: -913.4 MB). Peak memory consumption was 212.6 MB. Max. memory is 7.1 GB. [2018-09-26 21:44:44,153 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:44:44,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:44:44,154 INFO L168 Benchmark]: Boogie Preprocessor took 24.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:44:44,155 INFO L168 Benchmark]: RCFGBuilder took 681.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:44:44,156 INFO L168 Benchmark]: TraceAbstraction took 248305.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 888.7 MB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -934.6 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:44:44,160 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 0.27 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 43.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.86 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 681.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248305.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 888.7 MB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -934.6 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (1833states) and FLOYD_HOARE automaton (currently 43 states, 21 states before enhancement), while ReachableStatesComputation was computing reachable states (473 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while BasicCegarLoop was constructing difference of abstraction (1833states) and FLOYD_HOARE automaton (currently 43 states, 21 states before enhancement), while ReachableStatesComputation was computing reachable states (473 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while BasicCegarLoop was constructing difference of abstraction (1833states) and FLOYD_HOARE automaton (currently 43 states, 21 states before enhancement), while ReachableStatesComputation was computing reachable states (473 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while BasicCegarLoop was constructing difference of abstraction (1833states) and FLOYD_HOARE automaton (currently 43 states, 21 states before enhancement), while ReachableStatesComputation was computing reachable states (473 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 248.2s OverallTime, 40 OverallIterations, 3 TraceHistogramMax, 220.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2641 SDtfs, 6293 SDslu, 4916 SDs, 0 SdLazy, 28628 SolverSat, 7510 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2174 GetRequests, 632 SyntacticMatches, 5 SemanticMatches, 1537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1833occurred in iteration=39, 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: 8.0s AutomataMinimizationTime, 39 MinimizatonAttempts, 7389 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 15.8s InterpolantComputationTime, 1382 NumberOfCodeBlocks, 1382 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1305 ConstructedInterpolants, 28 QuantifiedInterpolants, 108135 SizeOfPredicates, 529 NumberOfNonLiveVariables, 9395 ConjunctsInSsa, 982 ConjunctsInUnsatCore, 77 InterpolantComputations, 9 PerfectInterpolantSequences, 76/332 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-44-44-188.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-44-44-188.csv Completed graceful shutdown