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/simple_false-unreach-call4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-21 22:12:10,109 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-21 22:12:10,111 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-21 22:12:10,123 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-21 22:12:10,123 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-21 22:12:10,124 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-21 22:12:10,125 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-21 22:12:10,127 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-21 22:12:10,128 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-21 22:12:10,129 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-21 22:12:10,129 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-21 22:12:10,130 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-21 22:12:10,131 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-21 22:12:10,131 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-21 22:12:10,132 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-21 22:12:10,133 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-21 22:12:10,134 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-21 22:12:10,138 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-21 22:12:10,140 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-21 22:12:10,151 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-21 22:12:10,152 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-21 22:12:10,153 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-21 22:12:10,155 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-21 22:12:10,168 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 22:12:10,187 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-21 22:12:10,187 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-21 22:12:10,188 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-21 22:12:10,188 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-21 22:12:10,188 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-21 22:12:10,189 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-21 22:12:10,189 INFO L133 SettingsManager]: * Use SBE=true [2018-07-21 22:12:10,189 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-21 22:12:10,189 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-21 22:12:10,189 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-21 22:12:10,190 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-21 22:12:10,190 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-21 22:12:10,190 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-21 22:12:10,190 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-21 22:12:10,190 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-21 22:12:10,191 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-21 22:12:10,191 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-21 22:12:10,191 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-21 22:12:10,191 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-21 22:12:10,191 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-21 22:12:10,192 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-21 22:12:10,192 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-21 22:12:10,192 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-21 22:12:10,192 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-21 22:12:10,192 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-21 22:12:10,192 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-21 22:12:10,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-21 22:12:10,193 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-21 22:12:10,193 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-21 22:12:10,245 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-21 22:12:10,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-21 22:12:10,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-21 22:12:10,268 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-21 22:12:10,269 INFO L276 PluginConnector]: CDTParser initialized [2018-07-21 22:12:10,270 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_false-unreach-call4.i [2018-07-21 22:12:10,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7bdecbf/71ccac08a0da4340ab7c6b7b891fa85e/FLAGecde6d1e6 [2018-07-21 22:12:10,785 INFO L276 CDTParser]: Found 1 translation units. [2018-07-21 22:12:10,785 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loop-acceleration/simple_false-unreach-call4.i [2018-07-21 22:12:10,792 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7bdecbf/71ccac08a0da4340ab7c6b7b891fa85e/FLAGecde6d1e6 [2018-07-21 22:12:10,804 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/cb7bdecbf/71ccac08a0da4340ab7c6b7b891fa85e [2018-07-21 22:12:10,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-21 22:12:10,822 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-21 22:12:10,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-21 22:12:10,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-21 22:12:10,831 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-21 22:12:10,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:12:10" (1/1) ... [2018-07-21 22:12:10,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6a0648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:10, skipping insertion in model container [2018-07-21 22:12:10,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:12:10" (1/1) ... [2018-07-21 22:12:10,966 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-21 22:12:11,001 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:12:11,018 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-21 22:12:11,022 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:12:11,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11 WrapperNode [2018-07-21 22:12:11,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-21 22:12:11,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-21 22:12:11,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-21 22:12:11,041 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-21 22:12:11,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-21 22:12:11,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-21 22:12:11,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-21 22:12:11,076 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-21 22:12:11,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (1/1) ... [2018-07-21 22:12:11,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-21 22:12:11,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-21 22:12:11,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-21 22:12:11,098 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-21 22:12:11,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (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 22:12:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-21 22:12:11,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-21 22:12:11,495 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-21 22:12:11,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:12:11 BoogieIcfgContainer [2018-07-21 22:12:11,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-21 22:12:11,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-21 22:12:11,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-21 22:12:11,503 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-21 22:12:11,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:12:10" (1/3) ... [2018-07-21 22:12:11,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:12:11, skipping insertion in model container [2018-07-21 22:12:11,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:12:11" (2/3) ... [2018-07-21 22:12:11,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e9e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:12:11, skipping insertion in model container [2018-07-21 22:12:11,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:12:11" (3/3) ... [2018-07-21 22:12:11,517 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_false-unreach-call4.i [2018-07-21 22:12:11,530 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-21 22:12:11,539 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-21 22:12:11,584 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-21 22:12:11,585 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-21 22:12:11,585 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-21 22:12:11,586 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-21 22:12:11,586 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-21 22:12:11,587 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-21 22:12:11,587 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-21 22:12:11,587 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-21 22:12:11,587 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-21 22:12:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-07-21 22:12:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-21 22:12:11,611 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:11,612 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-21 22:12:11,612 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-07-21 22:12:11,618 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:11,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:11,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:11,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:11,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:11,710 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 22:12:11,711 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:12:11,712 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-21 22:12:11,714 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-21 22:12:11,728 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-21 22:12:11,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:12:11,731 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-07-21 22:12:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:11,743 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-07-21 22:12:11,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-21 22:12:11,745 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-21 22:12:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:11,754 INFO L225 Difference]: With dead ends: 20 [2018-07-21 22:12:11,755 INFO L226 Difference]: Without dead ends: 8 [2018-07-21 22:12:11,758 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 22:12:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-21 22:12:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-21 22:12:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-21 22:12:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-21 22:12:11,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-21 22:12:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:11,790 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-21 22:12:11,790 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-21 22:12:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-21 22:12:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-21 22:12:11,790 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:11,791 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:11,791 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-07-21 22:12:11,791 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:11,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:11,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:11,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:11,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:11,900 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 22:12:11,900 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:12:11,900 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:12:11,902 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:12:11,902 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:12:11,903 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:12:11,903 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-07-21 22:12:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:11,966 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-21 22:12:11,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:12:11,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-21 22:12:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:11,968 INFO L225 Difference]: With dead ends: 14 [2018-07-21 22:12:11,968 INFO L226 Difference]: Without dead ends: 10 [2018-07-21 22:12:11,969 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 22:12:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-21 22:12:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-21 22:12:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-21 22:12:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-21 22:12:11,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-07-21 22:12:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:11,982 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-21 22:12:11,982 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:12:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-21 22:12:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-21 22:12:11,982 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:11,982 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:11,983 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-07-21 22:12:11,983 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:11,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:11,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:11,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:11,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:12,119 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 22:12:12,119 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:12,119 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 22:12:12,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:12,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:12,179 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 22:12:12,203 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:12,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-21 22:12:12,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-21 22:12:12,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-21 22:12:12,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:12:12,205 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-07-21 22:12:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:12,270 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-21 22:12:12,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-21 22:12:12,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-07-21 22:12:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:12,272 INFO L225 Difference]: With dead ends: 16 [2018-07-21 22:12:12,272 INFO L226 Difference]: Without dead ends: 12 [2018-07-21 22:12:12,272 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-21 22:12:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-21 22:12:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-21 22:12:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-21 22:12:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-21 22:12:12,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-07-21 22:12:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:12,276 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-21 22:12:12,276 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-21 22:12:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-21 22:12:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-21 22:12:12,277 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:12,277 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:12,278 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-07-21 22:12:12,279 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:12,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:12,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:12,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:12,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:12,416 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:12,416 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 22:12:12,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:12:12,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:12:12,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:12,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:12,481 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:12,481 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-21 22:12:12,481 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:12:12,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:12:12,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:12:12,482 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-07-21 22:12:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:12,620 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-21 22:12:12,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-21 22:12:12,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-21 22:12:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:12,621 INFO L225 Difference]: With dead ends: 18 [2018-07-21 22:12:12,621 INFO L226 Difference]: Without dead ends: 14 [2018-07-21 22:12:12,621 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 22:12:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-21 22:12:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-21 22:12:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-21 22:12:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-21 22:12:12,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-07-21 22:12:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:12,625 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-21 22:12:12,625 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:12:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-21 22:12:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-21 22:12:12,626 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:12,626 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:12,626 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-07-21 22:12:12,626 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:12,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:12,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:12,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:12,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:12,894 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:12,894 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 22:12:12,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:12:12,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-21 22:12:12,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:12,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:12,959 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:12,960 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-21 22:12:12,960 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-21 22:12:12,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-21 22:12:12,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:12:12,960 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-07-21 22:12:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:12,986 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-21 22:12:12,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 22:12:12,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-07-21 22:12:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:12,987 INFO L225 Difference]: With dead ends: 20 [2018-07-21 22:12:12,988 INFO L226 Difference]: Without dead ends: 16 [2018-07-21 22:12:12,988 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:12:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-21 22:12:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-21 22:12:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-21 22:12:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-21 22:12:12,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-07-21 22:12:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:12,991 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-21 22:12:12,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-21 22:12:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-21 22:12:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-21 22:12:12,992 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:12,992 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:12,993 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-07-21 22:12:12,993 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:12,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:12,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:12,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:12,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:13,111 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:13,112 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 22:12:13,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:12:13,133 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:12:13,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:13,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:13,224 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:13,224 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-21 22:12:13,225 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-21 22:12:13,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-21 22:12:13,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:12:13,225 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-07-21 22:12:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:13,280 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-21 22:12:13,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 22:12:13,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-07-21 22:12:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:13,281 INFO L225 Difference]: With dead ends: 22 [2018-07-21 22:12:13,281 INFO L226 Difference]: Without dead ends: 18 [2018-07-21 22:12:13,282 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 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 22:12:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-21 22:12:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-21 22:12:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-21 22:12:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-21 22:12:13,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-07-21 22:12:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:13,286 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-21 22:12:13,286 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-21 22:12:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-21 22:12:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-21 22:12:13,287 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:13,287 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:13,287 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-07-21 22:12:13,288 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:13,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:13,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:13,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:13,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:13,718 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:13,719 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) [2018-07-21 22:12:13,731 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:12:13,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-21 22:12:13,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:13,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:13,933 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:13,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-21 22:12:13,934 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:12:13,934 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:12:13,934 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:12:13,935 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-07-21 22:12:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:14,225 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-21 22:12:14,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-21 22:12:14,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-07-21 22:12:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:14,227 INFO L225 Difference]: With dead ends: 24 [2018-07-21 22:12:14,227 INFO L226 Difference]: Without dead ends: 20 [2018-07-21 22:12:14,227 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:12:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-21 22:12:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-21 22:12:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-21 22:12:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-21 22:12:14,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-07-21 22:12:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:14,231 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-21 22:12:14,231 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:12:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-21 22:12:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-21 22:12:14,232 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:14,232 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:14,232 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-07-21 22:12:14,232 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:14,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:14,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:14,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:14,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:14,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:14,425 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 22:12:14,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:12:14,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-21 22:12:14,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:14,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:14,518 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:14,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-21 22:12:14,519 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:12:14,519 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:12:14,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:12:14,520 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2018-07-21 22:12:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:14,604 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-21 22:12:14,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 22:12:14,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-07-21 22:12:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:14,606 INFO L225 Difference]: With dead ends: 26 [2018-07-21 22:12:14,606 INFO L226 Difference]: Without dead ends: 22 [2018-07-21 22:12:14,606 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:12:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-21 22:12:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-21 22:12:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:12:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-21 22:12:14,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-07-21 22:12:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:14,610 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-21 22:12:14,610 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:12:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-21 22:12:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-21 22:12:14,611 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:14,611 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:14,612 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash 361681633, now seen corresponding path program 7 times [2018-07-21 22:12:14,612 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:14,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:14,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:14,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:14,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:14,909 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:14,909 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 22:12:14,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:14,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:15,030 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:15,030 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-21 22:12:15,030 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:12:15,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:12:15,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:12:15,031 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2018-07-21 22:12:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:15,156 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-21 22:12:15,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:12:15,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-07-21 22:12:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:15,157 INFO L225 Difference]: With dead ends: 28 [2018-07-21 22:12:15,157 INFO L226 Difference]: Without dead ends: 24 [2018-07-21 22:12:15,158 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:12:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-21 22:12:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-21 22:12:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-21 22:12:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-21 22:12:15,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-07-21 22:12:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:15,163 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-21 22:12:15,163 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:12:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-21 22:12:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-21 22:12:15,164 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:15,164 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:15,165 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -268550885, now seen corresponding path program 8 times [2018-07-21 22:12:15,165 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:15,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:15,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:15,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:12:15,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:15,356 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:15,356 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 22:12:15,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:12:15,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:12:15,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:15,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:15,437 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:15,437 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-21 22:12:15,438 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-21 22:12:15,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-21 22:12:15,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:12:15,438 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2018-07-21 22:12:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:15,500 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-21 22:12:15,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-21 22:12:15,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-07-21 22:12:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:15,500 INFO L225 Difference]: With dead ends: 30 [2018-07-21 22:12:15,501 INFO L226 Difference]: Without dead ends: 26 [2018-07-21 22:12:15,501 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:12:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-21 22:12:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-21 22:12:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-21 22:12:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-21 22:12:15,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-07-21 22:12:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:15,505 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-21 22:12:15,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-21 22:12:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-21 22:12:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-21 22:12:15,506 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:15,506 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:15,506 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:15,507 INFO L82 PathProgramCache]: Analyzing trace with hash -331611947, now seen corresponding path program 9 times [2018-07-21 22:12:15,507 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:15,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:15,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:15,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:15,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:15,689 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:15,689 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 22:12:15,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:12:23,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-21 22:12:23,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:23,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:23,172 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:23,172 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-21 22:12:23,173 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:12:23,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:12:23,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:12:23,173 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2018-07-21 22:12:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:23,339 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-21 22:12:23,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:12:23,340 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-07-21 22:12:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:23,340 INFO L225 Difference]: With dead ends: 32 [2018-07-21 22:12:23,340 INFO L226 Difference]: Without dead ends: 28 [2018-07-21 22:12:23,341 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:12:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-21 22:12:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-21 22:12:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-21 22:12:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-21 22:12:23,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-07-21 22:12:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:23,344 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-21 22:12:23,346 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:12:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-21 22:12:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-21 22:12:23,347 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:23,347 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:23,347 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash -803750385, now seen corresponding path program 10 times [2018-07-21 22:12:23,347 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:23,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:23,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:23,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:23,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:23,830 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:23,830 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 22:12:23,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:12:23,861 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:12:23,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:12:23,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:12:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:23,917 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:12:23,917 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-21 22:12:23,917 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-21 22:12:23,918 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-21 22:12:23,918 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:12:23,918 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2018-07-21 22:12:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:12:24,101 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-21 22:12:24,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-21 22:12:24,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-07-21 22:12:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:12:24,102 INFO L225 Difference]: With dead ends: 34 [2018-07-21 22:12:24,102 INFO L226 Difference]: Without dead ends: 30 [2018-07-21 22:12:24,103 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:12:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-21 22:12:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-21 22:12:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-21 22:12:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-21 22:12:24,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-07-21 22:12:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:12:24,108 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-21 22:12:24,109 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-21 22:12:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-21 22:12:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-21 22:12:24,109 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:12:24,110 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1] [2018-07-21 22:12:24,110 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:12:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 737744073, now seen corresponding path program 11 times [2018-07-21 22:12:24,114 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:12:24,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:12:24,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:24,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:12:24,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:12:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:12:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:12:24,652 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:12:24,652 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 22:12:24,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:13:27,231 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-21 22:13:27,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:13:27,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:13:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:27,590 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:13:27,590 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-21 22:13:27,591 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-21 22:13:27,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-21 22:13:27,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:13:27,591 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2018-07-21 22:13:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:13:27,694 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-21 22:13:27,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-21 22:13:27,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-07-21 22:13:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:13:27,695 INFO L225 Difference]: With dead ends: 36 [2018-07-21 22:13:27,695 INFO L226 Difference]: Without dead ends: 32 [2018-07-21 22:13:27,696 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:13:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-21 22:13:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-21 22:13:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-21 22:13:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-21 22:13:27,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-07-21 22:13:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:13:27,700 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-21 22:13:27,700 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-21 22:13:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-21 22:13:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-21 22:13:27,701 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:13:27,701 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1] [2018-07-21 22:13:27,702 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:13:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 350201091, now seen corresponding path program 12 times [2018-07-21 22:13:27,702 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:13:27,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:13:27,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:27,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:13:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:27,898 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:13:27,898 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 22:13:27,904 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:13:37,959 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-21 22:13:37,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:13:37,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:13:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:37,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:13:37,997 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-21 22:13:37,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:13:37,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:13:37,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:13:37,998 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2018-07-21 22:13:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:13:38,147 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-21 22:13:38,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-21 22:13:38,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2018-07-21 22:13:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:13:38,148 INFO L225 Difference]: With dead ends: 38 [2018-07-21 22:13:38,148 INFO L226 Difference]: Without dead ends: 34 [2018-07-21 22:13:38,148 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:13:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-21 22:13:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-21 22:13:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-21 22:13:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-21 22:13:38,153 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-07-21 22:13:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:13:38,153 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-21 22:13:38,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:13:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-21 22:13:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-21 22:13:38,154 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:13:38,154 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1] [2018-07-21 22:13:38,154 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:13:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1583550141, now seen corresponding path program 13 times [2018-07-21 22:13:38,155 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:13:38,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:13:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:38,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:13:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:38,477 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:13:38,477 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 22:13:38,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:13:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:38,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:13:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:38,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:13:38,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-21 22:13:38,539 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-21 22:13:38,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-21 22:13:38,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:13:38,540 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 16 states. [2018-07-21 22:13:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:13:38,758 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-21 22:13:38,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-21 22:13:38,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-07-21 22:13:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:13:38,765 INFO L225 Difference]: With dead ends: 40 [2018-07-21 22:13:38,765 INFO L226 Difference]: Without dead ends: 36 [2018-07-21 22:13:38,765 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:13:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-21 22:13:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-21 22:13:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-21 22:13:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-21 22:13:38,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-07-21 22:13:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:13:38,771 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-21 22:13:38,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-21 22:13:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-21 22:13:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-21 22:13:38,772 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:13:38,772 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1] [2018-07-21 22:13:38,772 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:13:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1421013495, now seen corresponding path program 14 times [2018-07-21 22:13:38,772 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:13:38,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:13:38,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:38,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:13:38,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:39,106 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:13:39,127 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 22:13:39,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:13:39,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:13:39,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:13:39,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:13:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:39,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:13:39,285 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-21 22:13:39,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-21 22:13:39,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-21 22:13:39,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:13:39,286 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 17 states. [2018-07-21 22:13:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:13:39,778 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-21 22:13:39,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-21 22:13:39,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2018-07-21 22:13:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:13:39,778 INFO L225 Difference]: With dead ends: 42 [2018-07-21 22:13:39,778 INFO L226 Difference]: Without dead ends: 38 [2018-07-21 22:13:39,779 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:13:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-21 22:13:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-21 22:13:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-21 22:13:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-21 22:13:39,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-07-21 22:13:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:13:39,782 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-21 22:13:39,783 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-21 22:13:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-21 22:13:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-21 22:13:39,783 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:13:39,784 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1] [2018-07-21 22:13:39,784 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:13:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash -157880655, now seen corresponding path program 15 times [2018-07-21 22:13:39,784 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:13:39,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:13:39,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:39,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:13:39,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:40,039 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:13:40,039 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 22:13:40,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:13:45,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-21 22:13:45,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:13:45,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:13:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:45,814 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:13:45,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-21 22:13:45,815 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:13:45,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:13:45,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:13:45,815 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 18 states. [2018-07-21 22:13:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:13:45,977 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-21 22:13:45,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-21 22:13:45,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2018-07-21 22:13:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:13:45,978 INFO L225 Difference]: With dead ends: 44 [2018-07-21 22:13:45,978 INFO L226 Difference]: Without dead ends: 40 [2018-07-21 22:13:45,978 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:13:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-21 22:13:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-21 22:13:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-21 22:13:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-21 22:13:45,983 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-07-21 22:13:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:13:45,983 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-21 22:13:45,983 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:13:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-21 22:13:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-21 22:13:45,984 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:13:45,984 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1] [2018-07-21 22:13:45,984 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:13:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1351703317, now seen corresponding path program 16 times [2018-07-21 22:13:45,984 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:13:45,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:13:45,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:45,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:13:45,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:46,423 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:13:46,423 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 22:13:46,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:13:46,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:13:46,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:13:46,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:13:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:46,550 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:13:46,550 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-21 22:13:46,551 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-21 22:13:46,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-21 22:13:46,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:13:46,551 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 19 states. [2018-07-21 22:13:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:13:46,718 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-21 22:13:46,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-21 22:13:46,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2018-07-21 22:13:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:13:46,719 INFO L225 Difference]: With dead ends: 46 [2018-07-21 22:13:46,719 INFO L226 Difference]: Without dead ends: 42 [2018-07-21 22:13:46,719 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:13:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-21 22:13:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-21 22:13:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-21 22:13:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-21 22:13:46,723 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-07-21 22:13:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:13:46,723 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-21 22:13:46,723 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-21 22:13:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-21 22:13:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-21 22:13:46,724 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:13:46,725 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1] [2018-07-21 22:13:46,725 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:13:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1859013467, now seen corresponding path program 17 times [2018-07-21 22:13:46,725 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:13:46,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:13:46,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:46,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:13:46,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:13:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:13:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:13:47,523 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:13:47,523 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 22:13:47,529 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:16:32,875 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-07-21 22:16:32,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:16:33,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:16:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:16:33,377 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:16:33,378 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-21 22:16:33,378 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-21 22:16:33,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-21 22:16:33,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:16:33,379 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 20 states. [2018-07-21 22:16:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:16:34,142 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-21 22:16:34,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-21 22:16:34,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-07-21 22:16:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:16:34,143 INFO L225 Difference]: With dead ends: 48 [2018-07-21 22:16:34,143 INFO L226 Difference]: Without dead ends: 44 [2018-07-21 22:16:34,144 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:16:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-21 22:16:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-21 22:16:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-21 22:16:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-21 22:16:34,149 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-07-21 22:16:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:16:34,150 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-21 22:16:34,150 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-21 22:16:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-21 22:16:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-21 22:16:34,151 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:16:34,151 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1] [2018-07-21 22:16:34,151 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:16:34,152 INFO L82 PathProgramCache]: Analyzing trace with hash 242204127, now seen corresponding path program 18 times [2018-07-21 22:16:34,152 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:16:34,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:16:34,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:16:34,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:16:34,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:16:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:16:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:16:34,505 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:16:34,505 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) [2018-07-21 22:16:34,516 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown