java -Xss4m -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-21 22:17:12,091 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-21 22:17:12,097 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-21 22:17:12,110 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-21 22:17:12,111 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-21 22:17:12,112 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-21 22:17:12,113 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-21 22:17:12,121 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-21 22:17:12,123 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-21 22:17:12,123 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-21 22:17:12,126 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-21 22:17:12,126 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-21 22:17:12,127 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-21 22:17:12,128 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-21 22:17:12,131 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-21 22:17:12,132 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-21 22:17:12,133 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-21 22:17:12,144 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-21 22:17:12,150 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-21 22:17:12,152 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-21 22:17:12,153 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-21 22:17:12,154 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-21 22:17:12,156 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-21 22:17:12,173 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-21 22:17:12,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-21 22:17:12,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-21 22:17:12,194 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-21 22:17:12,194 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-21 22:17:12,195 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-21 22:17:12,195 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-21 22:17:12,195 INFO L133 SettingsManager]: * Use SBE=true [2018-07-21 22:17:12,196 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-21 22:17:12,196 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-21 22:17:12,196 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-21 22:17:12,196 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-21 22:17:12,196 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-21 22:17:12,197 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-21 22:17:12,197 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-21 22:17:12,197 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-21 22:17:12,197 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-21 22:17:12,197 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-21 22:17:12,198 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-21 22:17:12,198 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-21 22:17:12,198 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-21 22:17:12,198 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-21 22:17:12,198 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-21 22:17:12,199 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-21 22:17:12,199 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-21 22:17:12,199 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-21 22:17:12,199 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-21 22:17:12,199 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-21 22:17:12,199 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-21 22:17:12,200 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-21 22:17:12,238 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-21 22:17:12,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-21 22:17:12,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-21 22:17:12,257 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-21 22:17:12,258 INFO L276 PluginConnector]: CDTParser initialized [2018-07-21 22:17:12,258 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-07-21 22:17:12,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/16cdca793/cdde9bbf7b6b48e686792b602d439949/FLAG8d7a52295 [2018-07-21 22:17:12,852 INFO L276 CDTParser]: Found 1 translation units. [2018-07-21 22:17:12,852 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-07-21 22:17:12,859 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/16cdca793/cdde9bbf7b6b48e686792b602d439949/FLAG8d7a52295 [2018-07-21 22:17:12,876 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/16cdca793/cdde9bbf7b6b48e686792b602d439949 [2018-07-21 22:17:12,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-21 22:17:12,895 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-21 22:17:12,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-21 22:17:12,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-21 22:17:12,905 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-21 22:17:12,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:17:12" (1/1) ... [2018-07-21 22:17:12,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dee7603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:12, skipping insertion in model container [2018-07-21 22:17:12,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:17:12" (1/1) ... [2018-07-21 22:17:13,067 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-21 22:17:13,108 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:17:13,130 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-21 22:17:13,137 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:17:13,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13 WrapperNode [2018-07-21 22:17:13,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-21 22:17:13,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-21 22:17:13,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-21 22:17:13,156 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-21 22:17:13,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-21 22:17:13,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-21 22:17:13,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-21 22:17:13,194 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-21 22:17:13,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... [2018-07-21 22:17:13,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-21 22:17:13,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-21 22:17:13,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-21 22:17:13,223 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-21 22:17:13,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (1/1) ... No working directory specified, using /storage/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 [2018-07-21 22:17:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-21 22:17:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-21 22:17:13,802 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-21 22:17:13,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:17:13 BoogieIcfgContainer [2018-07-21 22:17:13,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-21 22:17:13,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-21 22:17:13,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-21 22:17:13,810 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-21 22:17:13,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:17:12" (1/3) ... [2018-07-21 22:17:13,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ee1392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:17:13, skipping insertion in model container [2018-07-21 22:17:13,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:13" (2/3) ... [2018-07-21 22:17:13,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ee1392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:17:13, skipping insertion in model container [2018-07-21 22:17:13,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:17:13" (3/3) ... [2018-07-21 22:17:13,814 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_true-unreach-call1_true-termination.i [2018-07-21 22:17:13,833 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-21 22:17:13,846 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-21 22:17:13,899 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-21 22:17:13,900 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-21 22:17:13,900 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-21 22:17:13,900 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-21 22:17:13,900 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-21 22:17:13,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-21 22:17:13,900 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-21 22:17:13,901 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-21 22:17:13,901 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-21 22:17:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-07-21 22:17:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-21 22:17:13,921 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:13,922 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-21 22:17:13,922 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-07-21 22:17:13,928 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:13,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:13,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:13,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:13,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:14,021 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:17:14,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-21 22:17:14,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-21 22:17:14,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-21 22:17:14,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:17:14,042 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-07-21 22:17:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:14,058 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-07-21 22:17:14,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-21 22:17:14,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-21 22:17:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:14,068 INFO L225 Difference]: With dead ends: 21 [2018-07-21 22:17:14,069 INFO L226 Difference]: Without dead ends: 9 [2018-07-21 22:17:14,071 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:17:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-21 22:17:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-21 22:17:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-21 22:17:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-07-21 22:17:14,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-07-21 22:17:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:14,115 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-07-21 22:17:14,115 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-21 22:17:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-07-21 22:17:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-21 22:17:14,118 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:14,118 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:14,119 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:14,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-07-21 22:17:14,119 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:14,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:14,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:14,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:14,263 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:17:14,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:17:14,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:17:14,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:17:14,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:17:14,266 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-07-21 22:17:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:14,361 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-07-21 22:17:14,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:17:14,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-21 22:17:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:14,365 INFO L225 Difference]: With dead ends: 16 [2018-07-21 22:17:14,365 INFO L226 Difference]: Without dead ends: 12 [2018-07-21 22:17:14,369 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:17:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-21 22:17:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-21 22:17:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-21 22:17:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-07-21 22:17:14,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-07-21 22:17:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:14,376 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-07-21 22:17:14,376 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:17:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-07-21 22:17:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-21 22:17:14,377 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:14,377 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:14,377 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-07-21 22:17:14,378 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:14,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:14,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:14,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:14,484 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:14,485 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:14,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:14,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:14,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:14,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-21 22:17:14,572 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 22:17:14,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 22:17:14,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:17:14,573 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-07-21 22:17:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:14,677 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-07-21 22:17:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 22:17:14,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-21 22:17:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:14,679 INFO L225 Difference]: With dead ends: 19 [2018-07-21 22:17:14,679 INFO L226 Difference]: Without dead ends: 15 [2018-07-21 22:17:14,680 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:17:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-21 22:17:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-07-21 22:17:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-21 22:17:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-07-21 22:17:14,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-07-21 22:17:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:14,684 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-07-21 22:17:14,684 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 22:17:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-07-21 22:17:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-21 22:17:14,685 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:14,685 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:14,685 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-07-21 22:17:14,685 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:14,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:14,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:14,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:14,790 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:14,790 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:14,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:14,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:14,871 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:14,871 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-21 22:17:14,872 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 22:17:14,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 22:17:14,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:17:14,873 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-07-21 22:17:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:14,953 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-07-21 22:17:14,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 22:17:14,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-21 22:17:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:14,954 INFO L225 Difference]: With dead ends: 21 [2018-07-21 22:17:14,955 INFO L226 Difference]: Without dead ends: 17 [2018-07-21 22:17:14,955 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:17:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-21 22:17:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-07-21 22:17:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-21 22:17:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-07-21 22:17:14,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-07-21 22:17:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:14,959 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-07-21 22:17:14,959 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 22:17:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-07-21 22:17:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:17:14,960 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:14,960 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:14,960 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-07-21 22:17:14,961 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:14,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:14,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:14,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:15,177 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:15,177 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:15,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:17:15,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:17:15,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:15,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:15,243 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:15,243 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-21 22:17:15,244 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:17:15,244 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:17:15,244 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:17:15,244 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-07-21 22:17:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:15,653 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-07-21 22:17:15,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-21 22:17:15,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-07-21 22:17:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:15,655 INFO L225 Difference]: With dead ends: 24 [2018-07-21 22:17:15,655 INFO L226 Difference]: Without dead ends: 20 [2018-07-21 22:17:15,656 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:17:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-21 22:17:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-07-21 22:17:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-21 22:17:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-07-21 22:17:15,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-07-21 22:17:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:15,662 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-07-21 22:17:15,662 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:17:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-07-21 22:17:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:17:15,663 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:15,665 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:15,665 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-07-21 22:17:15,665 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:15,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:15,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:15,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:15,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:15,785 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:17:15,786 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:17:15,786 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:17:15,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:17:15,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:17:15,787 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-07-21 22:17:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:15,855 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-07-21 22:17:15,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:17:15,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-07-21 22:17:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:15,856 INFO L225 Difference]: With dead ends: 33 [2018-07-21 22:17:15,856 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:17:15,857 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:17:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:17:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-07-21 22:17:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:17:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-07-21 22:17:15,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-07-21 22:17:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:15,863 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-07-21 22:17:15,863 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:17:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-07-21 22:17:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:17:15,864 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:15,864 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:15,864 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-07-21 22:17:15,865 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:15,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:15,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:15,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:15,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:15,937 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:17:15,937 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:17:15,938 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:17:15,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:17:15,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:17:15,938 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-07-21 22:17:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:15,965 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-07-21 22:17:15,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:17:15,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-07-21 22:17:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:15,967 INFO L225 Difference]: With dead ends: 33 [2018-07-21 22:17:15,967 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:17:15,967 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:17:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:17:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-07-21 22:17:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:17:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-07-21 22:17:15,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-07-21 22:17:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:15,975 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-07-21 22:17:15,975 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:17:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-07-21 22:17:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:17:15,975 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:15,976 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:15,976 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-07-21 22:17:15,976 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:15,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:15,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:15,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:15,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:16,179 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:16,180 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:16,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:17:16,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:17:16,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:16,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:16,246 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:16,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-21 22:17:16,247 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:17:16,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:17:16,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:17:16,247 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-07-21 22:17:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:16,318 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-07-21 22:17:16,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-21 22:17:16,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-07-21 22:17:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:16,319 INFO L225 Difference]: With dead ends: 30 [2018-07-21 22:17:16,319 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:17:16,320 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:17:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:17:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-07-21 22:17:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-21 22:17:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-07-21 22:17:16,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-07-21 22:17:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:16,326 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-07-21 22:17:16,326 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:17:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-07-21 22:17:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-21 22:17:16,326 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:16,326 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:16,327 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-07-21 22:17:16,327 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:16,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:16,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:16,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:16,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:16,689 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:16,689 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:16,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:17:28,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-07-21 22:17:28,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:28,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:29,178 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-21 22:17:43,565 WARN L169 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 38 DAG size of output: 3 [2018-07-21 22:17:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-21 22:17:43,596 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-21 22:17:43,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-07-21 22:17:43,597 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:17:43,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:17:43,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:17:43,597 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-07-21 22:17:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:43,925 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-07-21 22:17:43,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:17:43,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2018-07-21 22:17:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:43,926 INFO L225 Difference]: With dead ends: 37 [2018-07-21 22:17:43,926 INFO L226 Difference]: Without dead ends: 17 [2018-07-21 22:17:43,927 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:17:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-21 22:17:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-21 22:17:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-21 22:17:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-21 22:17:43,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2018-07-21 22:17:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:43,930 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-21 22:17:43,930 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:17:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-21 22:17:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-21 22:17:43,931 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:43,931 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:43,931 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:43,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-07-21 22:17:43,932 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:43,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:43,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:43,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:43,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:44,154 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:44,154 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:44,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:17:44,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-21 22:17:44,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:44,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:44,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:44,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-21 22:17:44,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-21 22:17:44,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-21 22:17:44,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:17:44,265 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-07-21 22:17:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:44,327 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-21 22:17:44,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 22:17:44,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-07-21 22:17:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:44,328 INFO L225 Difference]: With dead ends: 25 [2018-07-21 22:17:44,328 INFO L226 Difference]: Without dead ends: 21 [2018-07-21 22:17:44,329 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:17:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-21 22:17:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-07-21 22:17:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-21 22:17:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-21 22:17:44,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-07-21 22:17:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:44,332 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-21 22:17:44,333 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-21 22:17:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-21 22:17:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-21 22:17:44,333 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:44,333 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:44,334 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-07-21 22:17:44,334 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:44,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:44,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:44,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:44,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:44,435 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:44,435 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:44,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:17:44,457 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:17:44,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:44,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:44,503 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:44,504 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-21 22:17:44,504 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-21 22:17:44,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-21 22:17:44,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:17:44,505 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-07-21 22:17:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:44,587 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-21 22:17:44,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 22:17:44,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-07-21 22:17:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:44,588 INFO L225 Difference]: With dead ends: 28 [2018-07-21 22:17:44,589 INFO L226 Difference]: Without dead ends: 24 [2018-07-21 22:17:44,589 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:17:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-21 22:17:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-07-21 22:17:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-21 22:17:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-21 22:17:44,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-07-21 22:17:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:44,592 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-21 22:17:44,592 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-21 22:17:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-21 22:17:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-21 22:17:44,593 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:44,593 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:44,593 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:44,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-07-21 22:17:44,594 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:44,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:44,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:44,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:44,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:44,883 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:44,883 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:44,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:17:44,923 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-21 22:17:44,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:44,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:44,990 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:44,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-21 22:17:44,991 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:17:44,991 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:17:44,991 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:17:44,991 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2018-07-21 22:17:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:45,148 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-21 22:17:45,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-21 22:17:45,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-07-21 22:17:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:45,172 INFO L225 Difference]: With dead ends: 31 [2018-07-21 22:17:45,172 INFO L226 Difference]: Without dead ends: 27 [2018-07-21 22:17:45,172 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:17:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-21 22:17:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-07-21 22:17:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-21 22:17:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-21 22:17:45,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-07-21 22:17:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:45,176 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-21 22:17:45,177 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:17:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-21 22:17:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-21 22:17:45,177 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:45,177 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:45,178 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-07-21 22:17:45,178 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:45,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:45,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:45,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:45,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:45,736 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:45,736 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:45,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:17:45,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-21 22:17:45,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:45,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:45,950 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:45,950 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-21 22:17:45,951 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:17:45,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:17:45,951 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:17:45,951 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-07-21 22:17:46,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:46,089 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-21 22:17:46,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 22:17:46,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-07-21 22:17:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:46,090 INFO L225 Difference]: With dead ends: 34 [2018-07-21 22:17:46,091 INFO L226 Difference]: Without dead ends: 30 [2018-07-21 22:17:46,091 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:17:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-21 22:17:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-07-21 22:17:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-21 22:17:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-21 22:17:46,096 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-07-21 22:17:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:46,097 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-21 22:17:46,097 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:17:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-21 22:17:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-21 22:17:46,098 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:46,098 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:46,098 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-07-21 22:17:46,099 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:46,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:46,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:46,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:46,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:46,440 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:46,440 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-07-21 22:17:46,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:17:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:46,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:46,510 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:46,510 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-21 22:17:46,510 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:17:46,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:17:46,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:17:46,511 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-07-21 22:17:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:46,636 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-21 22:17:46,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:17:46,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-07-21 22:17:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:46,639 INFO L225 Difference]: With dead ends: 37 [2018-07-21 22:17:46,639 INFO L226 Difference]: Without dead ends: 33 [2018-07-21 22:17:46,639 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:17:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-21 22:17:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-07-21 22:17:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-21 22:17:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-21 22:17:46,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-07-21 22:17:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:46,645 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-21 22:17:46,645 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:17:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-21 22:17:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-21 22:17:46,646 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:46,646 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:46,648 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:46,648 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-07-21 22:17:46,648 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:46,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:46,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:46,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:46,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:46,968 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:46,968 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:46,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:17:47,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:17:47,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:47,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:47,045 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:47,045 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-21 22:17:47,045 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-21 22:17:47,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-21 22:17:47,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:17:47,046 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-07-21 22:17:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:47,175 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-21 22:17:47,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-21 22:17:47,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-07-21 22:17:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:47,176 INFO L225 Difference]: With dead ends: 40 [2018-07-21 22:17:47,176 INFO L226 Difference]: Without dead ends: 36 [2018-07-21 22:17:47,177 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:17:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-21 22:17:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-07-21 22:17:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-21 22:17:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-21 22:17:47,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-07-21 22:17:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:47,181 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-21 22:17:47,182 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-21 22:17:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-21 22:17:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-21 22:17:47,182 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:47,182 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:47,183 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-07-21 22:17:47,183 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:47,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:47,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:47,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:47,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:47,665 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:47,665 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:47,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:17:47,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-21 22:17:47,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:47,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:47,749 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:47,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-21 22:17:47,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:17:47,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:17:47,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:17:47,750 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-07-21 22:17:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:48,156 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-21 22:17:48,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:17:48,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-07-21 22:17:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:48,157 INFO L225 Difference]: With dead ends: 43 [2018-07-21 22:17:48,157 INFO L226 Difference]: Without dead ends: 39 [2018-07-21 22:17:48,158 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:17:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-21 22:17:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-07-21 22:17:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-21 22:17:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-21 22:17:48,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-07-21 22:17:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:48,163 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-21 22:17:48,163 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:17:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-21 22:17:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-21 22:17:48,164 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:48,164 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:48,164 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-07-21 22:17:48,164 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:48,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:48,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:48,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:48,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:48,347 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:48,347 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:48,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:17:48,371 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:17:48,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:48,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:48,429 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:48,429 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-21 22:17:48,429 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-21 22:17:48,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-21 22:17:48,430 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:17:48,430 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-07-21 22:17:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:48,740 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-21 22:17:48,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-21 22:17:48,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-07-21 22:17:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:48,741 INFO L225 Difference]: With dead ends: 46 [2018-07-21 22:17:48,741 INFO L226 Difference]: Without dead ends: 42 [2018-07-21 22:17:48,741 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:17:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-21 22:17:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-07-21 22:17:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-21 22:17:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-21 22:17:48,747 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-07-21 22:17:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:48,748 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-21 22:17:48,748 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-21 22:17:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-21 22:17:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-21 22:17:48,749 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:48,749 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:48,749 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-07-21 22:17:48,749 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:48,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:48,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:48,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:48,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:48,928 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:48,929 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:48,939 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:17:50,592 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-21 22:17:50,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:50,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:50,705 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:50,705 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-21 22:17:50,705 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-21 22:17:50,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-21 22:17:50,706 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:17:50,706 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-07-21 22:17:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:50,960 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-21 22:17:50,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-21 22:17:50,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-07-21 22:17:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:50,961 INFO L225 Difference]: With dead ends: 49 [2018-07-21 22:17:50,961 INFO L226 Difference]: Without dead ends: 45 [2018-07-21 22:17:50,961 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:17:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-21 22:17:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-07-21 22:17:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-21 22:17:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-21 22:17:50,966 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-07-21 22:17:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:50,967 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-21 22:17:50,967 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-21 22:17:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-21 22:17:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-21 22:17:50,968 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:50,968 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:50,968 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-07-21 22:17:50,968 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:50,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:50,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:50,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:50,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:51,294 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:51,294 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:17:51,300 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:17:51,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-21 22:17:51,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:51,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:51,443 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:51,444 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-21 22:17:51,444 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:17:51,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:17:51,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:17:51,445 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-07-21 22:17:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:51,649 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-21 22:17:51,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-21 22:17:51,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-07-21 22:17:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:51,657 INFO L225 Difference]: With dead ends: 52 [2018-07-21 22:17:51,657 INFO L226 Difference]: Without dead ends: 48 [2018-07-21 22:17:51,658 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:17:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-21 22:17:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-07-21 22:17:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-21 22:17:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-21 22:17:51,663 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-07-21 22:17:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:51,664 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-21 22:17:51,664 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:17:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-21 22:17:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-21 22:17:51,665 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:51,665 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:51,665 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-07-21 22:17:51,665 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:51,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:51,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:51,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:51,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:52,308 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:52,308 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:52,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:52,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:52,432 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:52,432 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-21 22:17:52,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-21 22:17:52,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-21 22:17:52,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:17:52,433 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-07-21 22:17:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:52,732 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-21 22:17:52,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-21 22:17:52,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-07-21 22:17:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:52,732 INFO L225 Difference]: With dead ends: 55 [2018-07-21 22:17:52,733 INFO L226 Difference]: Without dead ends: 51 [2018-07-21 22:17:52,733 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:17:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-21 22:17:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-07-21 22:17:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-21 22:17:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-21 22:17:52,738 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-07-21 22:17:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:52,739 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-21 22:17:52,739 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-21 22:17:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-21 22:17:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-21 22:17:52,740 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:52,740 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:52,740 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:52,740 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-07-21 22:17:52,740 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:52,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:52,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:52,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:17:52,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:52,976 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:52,976 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:52,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:17:52,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:17:52,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:53,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:53,060 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:53,060 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-21 22:17:53,060 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-21 22:17:53,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-21 22:17:53,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:17:53,061 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-07-21 22:17:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:53,471 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-21 22:17:53,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-21 22:17:53,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-07-21 22:17:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:53,473 INFO L225 Difference]: With dead ends: 58 [2018-07-21 22:17:53,473 INFO L226 Difference]: Without dead ends: 54 [2018-07-21 22:17:53,473 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:17:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-21 22:17:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-07-21 22:17:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-21 22:17:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-21 22:17:53,479 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-07-21 22:17:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:53,479 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-21 22:17:53,479 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-21 22:17:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-21 22:17:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-21 22:17:53,480 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:53,480 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:53,481 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-07-21 22:17:53,481 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:53,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:53,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:53,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:53,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:54,072 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:54,072 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:54,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:17:55,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-21 22:17:55,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:55,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:55,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:55,820 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-21 22:17:55,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:17:55,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:17:55,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:17:55,821 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-07-21 22:17:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:56,190 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-21 22:17:56,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-21 22:17:56,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-07-21 22:17:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:56,192 INFO L225 Difference]: With dead ends: 61 [2018-07-21 22:17:56,192 INFO L226 Difference]: Without dead ends: 57 [2018-07-21 22:17:56,192 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:17:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-21 22:17:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-07-21 22:17:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-21 22:17:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-21 22:17:56,197 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-07-21 22:17:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:56,198 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-21 22:17:56,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:17:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-21 22:17:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-21 22:17:56,199 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:56,199 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:56,199 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:56,199 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-07-21 22:17:56,199 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:56,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:56,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:56,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:56,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:57,139 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:57,139 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:57,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:17:57,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:17:57,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:17:57,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:17:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:57,222 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:17:57,222 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-21 22:17:57,222 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-21 22:17:57,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-21 22:17:57,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:17:57,223 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-07-21 22:17:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:17:57,705 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-21 22:17:57,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-21 22:17:57,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-07-21 22:17:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:17:57,706 INFO L225 Difference]: With dead ends: 64 [2018-07-21 22:17:57,706 INFO L226 Difference]: Without dead ends: 60 [2018-07-21 22:17:57,706 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:17:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-21 22:17:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-07-21 22:17:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-21 22:17:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-21 22:17:57,713 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-07-21 22:17:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:17:57,714 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-21 22:17:57,714 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-21 22:17:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-21 22:17:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-21 22:17:57,715 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:17:57,715 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-21 22:17:57,715 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:17:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-07-21 22:17:57,715 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:17:57,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:17:57,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:57,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:17:57,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:17:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:17:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:17:58,331 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:17:58,331 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:17:58,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:18:57,707 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-07-21 22:18:57,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:18:57,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:18:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:18:57,777 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:18:57,777 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-21 22:18:57,777 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-21 22:18:57,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-21 22:18:57,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:18:57,778 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-07-21 22:18:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:18:58,067 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-21 22:18:58,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-21 22:18:58,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-07-21 22:18:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:18:58,067 INFO L225 Difference]: With dead ends: 67 [2018-07-21 22:18:58,068 INFO L226 Difference]: Without dead ends: 63 [2018-07-21 22:18:58,068 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:18:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-21 22:18:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-07-21 22:18:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-21 22:18:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-21 22:18:58,074 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-07-21 22:18:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:18:58,075 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-21 22:18:58,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-21 22:18:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-21 22:18:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-21 22:18:58,076 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:18:58,076 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-21 22:18:58,077 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:18:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-07-21 22:18:58,077 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:18:58,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:18:58,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:18:58,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:18:58,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:18:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:18:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:18:59,096 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:18:59,096 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:18:59,104 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:19:01,275 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-07-21 22:19:01,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:19:01,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:19:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:01,333 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:19:01,333 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-21 22:19:01,333 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-21 22:19:01,333 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-21 22:19:01,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:19:01,334 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-07-21 22:19:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:19:01,674 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-21 22:19:01,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-21 22:19:01,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-07-21 22:19:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:19:01,674 INFO L225 Difference]: With dead ends: 70 [2018-07-21 22:19:01,675 INFO L226 Difference]: Without dead ends: 66 [2018-07-21 22:19:01,675 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:19:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-21 22:19:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-07-21 22:19:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-21 22:19:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-21 22:19:01,680 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-07-21 22:19:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:19:01,680 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-21 22:19:01,680 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-21 22:19:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-21 22:19:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-21 22:19:01,682 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:19:01,682 INFO L358 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-21 22:19:01,683 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:19:01,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-07-21 22:19:01,683 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:19:01,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:19:01,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:01,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:19:01,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:19:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:02,089 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:19:02,089 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:19:02,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:19:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:19:02,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:19:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:02,149 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:19:02,149 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-21 22:19:02,150 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-21 22:19:02,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-21 22:19:02,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:19:02,150 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-07-21 22:19:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:19:02,485 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-21 22:19:02,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-21 22:19:02,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-07-21 22:19:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:19:02,486 INFO L225 Difference]: With dead ends: 73 [2018-07-21 22:19:02,486 INFO L226 Difference]: Without dead ends: 69 [2018-07-21 22:19:02,487 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:19:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-21 22:19:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-07-21 22:19:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-21 22:19:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-21 22:19:02,491 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-07-21 22:19:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:19:02,492 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-21 22:19:02,492 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-21 22:19:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-21 22:19:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-21 22:19:02,493 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:19:02,493 INFO L358 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-21 22:19:02,493 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:19:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-07-21 22:19:02,493 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:19:02,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:19:02,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:02,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:19:02,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:19:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:03,599 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:19:03,599 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:19:03,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:19:03,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:19:03,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:19:03,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:19:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:03,693 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:19:03,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-21 22:19:03,694 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-21 22:19:03,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-21 22:19:03,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:19:03,694 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-07-21 22:19:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:19:04,066 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-21 22:19:04,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-21 22:19:04,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-07-21 22:19:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:19:04,067 INFO L225 Difference]: With dead ends: 76 [2018-07-21 22:19:04,067 INFO L226 Difference]: Without dead ends: 72 [2018-07-21 22:19:04,068 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:19:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-21 22:19:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-07-21 22:19:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-21 22:19:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-21 22:19:04,073 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-07-21 22:19:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:19:04,073 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-21 22:19:04,073 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-21 22:19:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-21 22:19:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-21 22:19:04,074 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:19:04,074 INFO L358 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-21 22:19:04,074 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:19:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-07-21 22:19:04,075 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:19:04,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:19:04,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:04,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:19:04,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:19:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:05,013 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:19:05,013 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:19:05,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:19:07,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-07-21 22:19:07,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:19:07,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:19:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:07,476 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:19:07,477 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-21 22:19:07,477 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-21 22:19:07,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-21 22:19:07,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:19:07,477 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-07-21 22:19:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:19:07,908 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-21 22:19:07,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-21 22:19:07,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-07-21 22:19:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:19:07,909 INFO L225 Difference]: With dead ends: 79 [2018-07-21 22:19:07,909 INFO L226 Difference]: Without dead ends: 75 [2018-07-21 22:19:07,909 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:19:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-21 22:19:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-07-21 22:19:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-21 22:19:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-21 22:19:07,913 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-07-21 22:19:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:19:07,915 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-21 22:19:07,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-21 22:19:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-21 22:19:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-21 22:19:07,916 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:19:07,916 INFO L358 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-21 22:19:07,916 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:19:07,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-07-21 22:19:07,917 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:19:07,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:19:07,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:07,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:19:07,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:19:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:09,237 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:19:09,237 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:19:09,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:19:09,260 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:19:09,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:19:09,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:19:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:09,333 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:19:09,333 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-21 22:19:09,334 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-21 22:19:09,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-21 22:19:09,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:19:09,335 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-07-21 22:19:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:19:09,838 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-21 22:19:09,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-21 22:19:09,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-07-21 22:19:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:19:09,839 INFO L225 Difference]: With dead ends: 82 [2018-07-21 22:19:09,839 INFO L226 Difference]: Without dead ends: 78 [2018-07-21 22:19:09,839 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:19:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-21 22:19:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-07-21 22:19:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-21 22:19:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-21 22:19:09,844 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-07-21 22:19:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:19:09,844 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-21 22:19:09,844 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-21 22:19:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-21 22:19:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-21 22:19:09,845 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:19:09,845 INFO L358 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-21 22:19:09,846 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:19:09,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1671499474, now seen corresponding path program 23 times [2018-07-21 22:19:09,846 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:19:09,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:19:09,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:09,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:19:09,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:19:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:19:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:19:10,748 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:19:10,748 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:19:10,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:20:45,751 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-07-21 22:20:45,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:20:45,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:20:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:20:45,839 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:20:45,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-07-21 22:20:45,840 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-21 22:20:45,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-21 22:20:45,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-07-21 22:20:45,840 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-07-21 22:20:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:20:46,395 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-21 22:20:46,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-21 22:20:46,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-07-21 22:20:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:20:46,396 INFO L225 Difference]: With dead ends: 85 [2018-07-21 22:20:46,397 INFO L226 Difference]: Without dead ends: 81 [2018-07-21 22:20:46,397 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-07-21 22:20:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-21 22:20:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-07-21 22:20:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-21 22:20:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-21 22:20:46,404 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-07-21 22:20:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:20:46,404 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-21 22:20:46,404 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-21 22:20:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-21 22:20:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-21 22:20:46,404 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:20:46,405 INFO L358 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-21 22:20:46,405 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:20:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1766571793, now seen corresponding path program 24 times [2018-07-21 22:20:46,405 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:20:46,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:20:46,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:20:46,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:20:46,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:20:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:20:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:20:47,431 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:20:47,431 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:20:47,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:21:38,588 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-07-21 22:21:38,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:21:38,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:21:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:21:38,663 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:21:38,663 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-21 22:21:38,663 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-21 22:21:38,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-21 22:21:38,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-07-21 22:21:38,664 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-07-21 22:21:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:21:39,168 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-21 22:21:39,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-21 22:21:39,169 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-07-21 22:21:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:21:39,169 INFO L225 Difference]: With dead ends: 88 [2018-07-21 22:21:39,169 INFO L226 Difference]: Without dead ends: 84 [2018-07-21 22:21:39,170 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-07-21 22:21:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-21 22:21:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-07-21 22:21:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-21 22:21:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-21 22:21:39,173 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-07-21 22:21:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:21:39,173 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-21 22:21:39,173 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-21 22:21:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-21 22:21:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-21 22:21:39,174 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:21:39,174 INFO L358 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-21 22:21:39,174 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:21:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1032388018, now seen corresponding path program 25 times [2018-07-21 22:21:39,175 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:21:39,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:21:39,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:21:39,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:21:39,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:21:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:21:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:21:40,072 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:21:40,072 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:21:40,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:21:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:21:40,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:21:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:21:40,137 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:21:40,137 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-07-21 22:21:40,137 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-21 22:21:40,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-21 22:21:40,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:21:40,138 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-07-21 22:21:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:21:40,670 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-21 22:21:40,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-21 22:21:40,671 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-07-21 22:21:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:21:40,671 INFO L225 Difference]: With dead ends: 91 [2018-07-21 22:21:40,671 INFO L226 Difference]: Without dead ends: 87 [2018-07-21 22:21:40,672 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:21:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-21 22:21:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-07-21 22:21:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-21 22:21:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-21 22:21:40,678 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-07-21 22:21:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:21:40,678 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-21 22:21:40,678 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-21 22:21:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-21 22:21:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-21 22:21:40,679 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:21:40,679 INFO L358 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-21 22:21:40,679 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:21:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1945934321, now seen corresponding path program 26 times [2018-07-21 22:21:40,679 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:21:40,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:21:40,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:21:40,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:21:40,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:21:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:21:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:21:41,791 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:21:41,823 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:21:41,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:21:41,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:21:41,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:21:41,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:21:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:21:41,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:21:41,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-21 22:21:41,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-21 22:21:41,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-21 22:21:41,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-07-21 22:21:41,924 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-07-21 22:21:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:21:42,536 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-21 22:21:42,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-21 22:21:42,536 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-07-21 22:21:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:21:42,537 INFO L225 Difference]: With dead ends: 94 [2018-07-21 22:21:42,537 INFO L226 Difference]: Without dead ends: 90 [2018-07-21 22:21:42,537 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-07-21 22:21:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-21 22:21:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-07-21 22:21:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-21 22:21:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-21 22:21:42,542 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-07-21 22:21:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:21:42,543 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-21 22:21:42,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-21 22:21:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-21 22:21:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-21 22:21:42,543 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:21:42,544 INFO L358 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-21 22:21:42,544 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:21:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash -582632594, now seen corresponding path program 27 times [2018-07-21 22:21:42,544 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:21:42,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:21:42,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:21:42,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:21:42,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:21:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:21:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:21:43,062 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:21:43,062 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:21:43,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown